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Finding the Fourth Proportional to 9,007.92, 12,430.80 and 5,028.78

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Solution

The fourth proportional to 9,007.92, 12,430.80 and 5,028.78 is: 6,939.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,007.92 : 12,430.80 = 5,028.78 : x
  2. Step 2: Convert to fraction form
    9,007.92/12,430.80 = 5,028.78/x
  3. Step 3: Cross multiply
    9,007.92x = 12,430.80 × 5,028.78
  4. Step 4: Simplify right side
    9,007.92x = 62,511,758.42
  5. Step 5: Solve for x
    x = 62,511,758.42/9,007.92
  6. Step 6: Final answer
    x = 6,939.64

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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.