Home / 20,718.15-28,593.11-12,651.36

Finding the Fourth Proportional to 20,718.15, 28,593.11 and 12,651.36

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Solution

The fourth proportional to 20,718.15, 28,593.11 and 12,651.36 is: 17,460.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.15 : 28,593.11 = 12,651.36 : x
  2. Step 2: Convert to fraction form
    20,718.15/28,593.11 = 12,651.36/x
  3. Step 3: Cross multiply
    20,718.15x = 28,593.11 × 12,651.36
  4. Step 4: Simplify right side
    20,718.15x = 361,741,521.91
  5. Step 5: Solve for x
    x = 361,741,521.91/20,718.15
  6. Step 6: Final answer
    x = 17,460.13

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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.