Home / 20,538.88-28,330.61-13,465.76

Finding the Fourth Proportional to 20,538.88, 28,330.61 and 13,465.76

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Solution

The fourth proportional to 20,538.88, 28,330.61 and 13,465.76 is: 18,574.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.88 : 28,330.61 = 13,465.76 : x
  2. Step 2: Convert to fraction form
    20,538.88/28,330.61 = 13,465.76/x
  3. Step 3: Cross multiply
    20,538.88x = 28,330.61 × 13,465.76
  4. Step 4: Simplify right side
    20,538.88x = 381,493,194.91
  5. Step 5: Solve for x
    x = 381,493,194.91/20,538.88
  6. Step 6: Final answer
    x = 18,574.20

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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.