Home / 20,565.57-28,381.01-12,612.18

Finding the Fourth Proportional to 20,565.57, 28,381.01 and 12,612.18

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Solution

The fourth proportional to 20,565.57, 28,381.01 and 12,612.18 is: 17,405.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.57 : 28,381.01 = 12,612.18 : x
  2. Step 2: Convert to fraction form
    20,565.57/28,381.01 = 12,612.18/x
  3. Step 3: Cross multiply
    20,565.57x = 28,381.01 × 12,612.18
  4. Step 4: Simplify right side
    20,565.57x = 357,946,343.64
  5. Step 5: Solve for x
    x = 357,946,343.64/20,565.57
  6. Step 6: Final answer
    x = 17,405.13

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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.