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Finding the Fourth Proportional to 28,423.78, 42,632.62 and 8,702.30

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Solution

The fourth proportional to 28,423.78, 42,632.62 and 8,702.30 is: 13,052.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.78 : 42,632.62 = 8,702.30 : x
  2. Step 2: Convert to fraction form
    28,423.78/42,632.62 = 8,702.30/x
  3. Step 3: Cross multiply
    28,423.78x = 42,632.62 × 8,702.30
  4. Step 4: Simplify right side
    28,423.78x = 371,001,849.03
  5. Step 5: Solve for x
    x = 371,001,849.03/28,423.78
  6. Step 6: Final answer
    x = 13,052.52

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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.