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Finding the Fourth Proportional to 28,645.92, 42,952.68 and 8,918.64

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Solution

The fourth proportional to 28,645.92, 42,952.68 and 8,918.64 is: 13,372.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,645.92 : 42,952.68 = 8,918.64 : x
  2. Step 2: Convert to fraction form
    28,645.92/42,952.68 = 8,918.64/x
  3. Step 3: Cross multiply
    28,645.92x = 42,952.68 × 8,918.64
  4. Step 4: Simplify right side
    28,645.92x = 383,079,489.96
  5. Step 5: Solve for x
    x = 383,079,489.96/28,645.92
  6. Step 6: Final answer
    x = 13,372.92

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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.