Home / 20,522.52-28,339.74-15,478.11

Finding the Fourth Proportional to 20,522.52, 28,339.74 and 15,478.11

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Solution

The fourth proportional to 20,522.52, 28,339.74 and 15,478.11 is: 21,373.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,522.52 : 28,339.74 = 15,478.11 : x
  2. Step 2: Convert to fraction form
    20,522.52/28,339.74 = 15,478.11/x
  3. Step 3: Cross multiply
    20,522.52x = 28,339.74 × 15,478.11
  4. Step 4: Simplify right side
    20,522.52x = 438,645,613.09
  5. Step 5: Solve for x
    x = 438,645,613.09/20,522.52
  6. Step 6: Final answer
    x = 21,373.87

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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.