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Finding the Fourth Proportional to 28,077.92, 42,117.96 and 8,356.16

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Solution

The fourth proportional to 28,077.92, 42,117.96 and 8,356.16 is: 12,534.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,077.92 : 42,117.96 = 8,356.16 : x
  2. Step 2: Convert to fraction form
    28,077.92/42,117.96 = 8,356.16/x
  3. Step 3: Cross multiply
    28,077.92x = 42,117.96 × 8,356.16
  4. Step 4: Simplify right side
    28,077.92x = 351,944,412.63
  5. Step 5: Solve for x
    x = 351,944,412.63/28,077.92
  6. Step 6: Final answer
    x = 12,534.56

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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.