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Finding the Fourth Proportional to 8,784.30, 12,125.07 and 7,229.10

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Solution

The fourth proportional to 8,784.30, 12,125.07 and 7,229.10 is: 9,978.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,784.30 : 12,125.07 = 7,229.10 : x
  2. Step 2: Convert to fraction form
    8,784.30/12,125.07 = 7,229.10/x
  3. Step 3: Cross multiply
    8,784.30x = 12,125.07 × 7,229.10
  4. Step 4: Simplify right side
    8,784.30x = 87,653,343.54
  5. Step 5: Solve for x
    x = 87,653,343.54/8,784.30
  6. Step 6: Final answer
    x = 9,978.41

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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.