Home / 20,640.28-28,498.38-12,693.16

Finding the Fourth Proportional to 20,640.28, 28,498.38 and 12,693.16

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Solution

The fourth proportional to 20,640.28, 28,498.38 and 12,693.16 is: 17,525.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.28 : 28,498.38 = 12,693.16 : x
  2. Step 2: Convert to fraction form
    20,640.28/28,498.38 = 12,693.16/x
  3. Step 3: Cross multiply
    20,640.28x = 28,498.38 × 12,693.16
  4. Step 4: Simplify right side
    20,640.28x = 361,734,497.08
  5. Step 5: Solve for x
    x = 361,734,497.08/20,640.28
  6. Step 6: Final answer
    x = 17,525.66

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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.