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Finding the Fourth Proportional to 28,502.36, 42,753.86 and 8,780.76

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Solution

The fourth proportional to 28,502.36, 42,753.86 and 8,780.76 is: 13,171.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,502.36 : 42,753.86 = 8,780.76 : x
  2. Step 2: Convert to fraction form
    28,502.36/42,753.86 = 8,780.76/x
  3. Step 3: Cross multiply
    28,502.36x = 42,753.86 × 8,780.76
  4. Step 4: Simplify right side
    28,502.36x = 375,411,383.73
  5. Step 5: Solve for x
    x = 375,411,383.73/28,502.36
  6. Step 6: Final answer
    x = 13,171.24

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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.