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Finding the Fourth Proportional to 9,114.90, 12,552.08 and 7,919.34

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Solution

The fourth proportional to 9,114.90, 12,552.08 and 7,919.34 is: 10,905.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,114.90 : 12,552.08 = 7,919.34 : x
  2. Step 2: Convert to fraction form
    9,114.90/12,552.08 = 7,919.34/x
  3. Step 3: Cross multiply
    9,114.90x = 12,552.08 × 7,919.34
  4. Step 4: Simplify right side
    9,114.90x = 99,404,189.23
  5. Step 5: Solve for x
    x = 99,404,189.23/9,114.90
  6. Step 6: Final answer
    x = 10,905.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.