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Finding the Fourth Proportional to 28,642.64, 42,963.92 and 15,520.64

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Solution

The fourth proportional to 28,642.64, 42,963.92 and 15,520.64 is: 23,280.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,642.64 : 42,963.92 = 15,520.64 : x
  2. Step 2: Convert to fraction form
    28,642.64/42,963.92 = 15,520.64/x
  3. Step 3: Cross multiply
    28,642.64x = 42,963.92 × 15,520.64
  4. Step 4: Simplify right side
    28,642.64x = 666,827,535.31
  5. Step 5: Solve for x
    x = 666,827,535.31/28,642.64
  6. Step 6: Final answer
    x = 23,280.94

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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.