Home / 20,565.04-28,382.52-12,605.80

Finding the Fourth Proportional to 20,565.04, 28,382.52 and 12,605.80

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Solution

The fourth proportional to 20,565.04, 28,382.52 and 12,605.80 is: 17,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.04 : 28,382.52 = 12,605.80 : x
  2. Step 2: Convert to fraction form
    20,565.04/28,382.52 = 12,605.80/x
  3. Step 3: Cross multiply
    20,565.04x = 28,382.52 × 12,605.80
  4. Step 4: Simplify right side
    20,565.04x = 357,784,370.62
  5. Step 5: Solve for x
    x = 357,784,370.62/20,565.04
  6. Step 6: Final answer
    x = 17,397.70

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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.