Home / 20,639.80-28,487.46-13,566.88

Finding the Fourth Proportional to 20,639.80, 28,487.46 and 13,566.88

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Solution

The fourth proportional to 20,639.80, 28,487.46 and 13,566.88 is: 18,725.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.80 : 28,487.46 = 13,566.88 : x
  2. Step 2: Convert to fraction form
    20,639.80/28,487.46 = 13,566.88/x
  3. Step 3: Cross multiply
    20,639.80x = 28,487.46 × 13,566.88
  4. Step 4: Simplify right side
    20,639.80x = 386,485,951.32
  5. Step 5: Solve for x
    x = 386,485,951.32/20,639.80
  6. Step 6: Final answer
    x = 18,725.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.