Home / 20,565.87-28,381.43-12,612.48

Finding the Fourth Proportional to 20,565.87, 28,381.43 and 12,612.48

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Solution

The fourth proportional to 20,565.87, 28,381.43 and 12,612.48 is: 17,405.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.87 : 28,381.43 = 12,612.48 : x
  2. Step 2: Convert to fraction form
    20,565.87/28,381.43 = 12,612.48/x
  3. Step 3: Cross multiply
    20,565.87x = 28,381.43 × 12,612.48
  4. Step 4: Simplify right side
    20,565.87x = 357,960,294.13
  5. Step 5: Solve for x
    x = 357,960,294.13/20,565.87
  6. Step 6: Final answer
    x = 17,405.55

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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.