Home / 21,132.48-31,677.12-13,751.76

Finding the Fourth Proportional to 21,132.48, 31,677.12 and 13,751.76

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Solution

The fourth proportional to 21,132.48, 31,677.12 and 13,751.76 is: 20,613.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.48 : 31,677.12 = 13,751.76 : x
  2. Step 2: Convert to fraction form
    21,132.48/31,677.12 = 13,751.76/x
  3. Step 3: Cross multiply
    21,132.48x = 31,677.12 × 13,751.76
  4. Step 4: Simplify right side
    21,132.48x = 435,616,151.73
  5. Step 5: Solve for x
    x = 435,616,151.73/21,132.48
  6. Step 6: Final answer
    x = 20,613.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.