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Finding the Fourth Proportional to 9,390.40, 14,072.80 and 7,662.40

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Solution

The fourth proportional to 9,390.40, 14,072.80 and 7,662.40 is: 11,483.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,390.40 : 14,072.80 = 7,662.40 : x
  2. Step 2: Convert to fraction form
    9,390.40/14,072.80 = 7,662.40/x
  3. Step 3: Cross multiply
    9,390.40x = 14,072.80 × 7,662.40
  4. Step 4: Simplify right side
    9,390.40x = 107,831,422.72
  5. Step 5: Solve for x
    x = 107,831,422.72/9,390.40
  6. Step 6: Final answer
    x = 11,483.16

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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.