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Finding the Fourth Proportional to 28,616.76, 42,932.16 and 8,897.04

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Solution

The fourth proportional to 28,616.76, 42,932.16 and 8,897.04 is: 13,347.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.76 : 42,932.16 = 8,897.04 : x
  2. Step 2: Convert to fraction form
    28,616.76/42,932.16 = 8,897.04/x
  3. Step 3: Cross multiply
    28,616.76x = 42,932.16 × 8,897.04
  4. Step 4: Simplify right side
    28,616.76x = 381,969,144.81
  5. Step 5: Solve for x
    x = 381,969,144.81/28,616.76
  6. Step 6: Final answer
    x = 13,347.74

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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.