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Finding the Fourth Proportional to 28,534.72, 42,799.68 and 9,813.76

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Solution

The fourth proportional to 28,534.72, 42,799.68 and 9,813.76 is: 14,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.72 : 42,799.68 = 9,813.76 : x
  2. Step 2: Convert to fraction form
    28,534.72/42,799.68 = 9,813.76/x
  3. Step 3: Cross multiply
    28,534.72x = 42,799.68 × 9,813.76
  4. Step 4: Simplify right side
    28,534.72x = 420,025,787.60
  5. Step 5: Solve for x
    x = 420,025,787.60/28,534.72
  6. Step 6: Final answer
    x = 14,719.81

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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.