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Finding the Fourth Proportional to 9,978,312.90, 14,967,469.35 and 9,021,719.10

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Solution

The fourth proportional to 9,978,312.90, 14,967,469.35 and 9,021,719.10 is: 13,532,578.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,978,312.90 : 14,967,469.35 = 9,021,719.10 : x
  2. Step 2: Convert to fraction form
    9,978,312.90/14,967,469.35 = 9,021,719.10/x
  3. Step 3: Cross multiply
    9,978,312.90x = 14,967,469.35 × 9,021,719.10
  4. Step 4: Simplify right side
    9,978,312.90x = 135,032,304,113,559.58
  5. Step 5: Solve for x
    x = 135,032,304,113,559.58/9,978,312.90
  6. Step 6: Final answer
    x = 13,532,578.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.