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Finding the Fourth Proportional to 9,007.89, 12,430.80 and 5,028.90

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Solution

The fourth proportional to 9,007.89, 12,430.80 and 5,028.90 is: 6,939.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,007.89 : 12,430.80 = 5,028.90 : x
  2. Step 2: Convert to fraction form
    9,007.89/12,430.80 = 5,028.90/x
  3. Step 3: Cross multiply
    9,007.89x = 12,430.80 × 5,028.90
  4. Step 4: Simplify right side
    9,007.89x = 62,513,250.12
  5. Step 5: Solve for x
    x = 62,513,250.12/9,007.89
  6. Step 6: Final answer
    x = 6,939.83

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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.