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Finding the Fourth Proportional to 28,652.76, 42,979.08 and 13,863.12

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Solution

The fourth proportional to 28,652.76, 42,979.08 and 13,863.12 is: 20,794.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.76 : 42,979.08 = 13,863.12 : x
  2. Step 2: Convert to fraction form
    28,652.76/42,979.08 = 13,863.12/x
  3. Step 3: Cross multiply
    28,652.76x = 42,979.08 × 13,863.12
  4. Step 4: Simplify right side
    28,652.76x = 595,824,143.53
  5. Step 5: Solve for x
    x = 595,824,143.53/28,652.76
  6. Step 6: Final answer
    x = 20,794.65

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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.