Home / 20,663.20-28,516.76-12,708.19

Finding the Fourth Proportional to 20,663.20, 28,516.76 and 12,708.19

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Solution

The fourth proportional to 20,663.20, 28,516.76 and 12,708.19 is: 17,538.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.20 : 28,516.76 = 12,708.19 : x
  2. Step 2: Convert to fraction form
    20,663.20/28,516.76 = 12,708.19/x
  3. Step 3: Cross multiply
    20,663.20x = 28,516.76 × 12,708.19
  4. Step 4: Simplify right side
    20,663.20x = 362,396,404.26
  5. Step 5: Solve for x
    x = 362,396,404.26/20,663.20
  6. Step 6: Final answer
    x = 17,538.25

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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.