Home / 20,819.30-28,740.02-13,275.76

Finding the Fourth Proportional to 20,819.30, 28,740.02 and 13,275.76

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Solution

The fourth proportional to 20,819.30, 28,740.02 and 13,275.76 is: 18,326.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.30 : 28,740.02 = 13,275.76 : x
  2. Step 2: Convert to fraction form
    20,819.30/28,740.02 = 13,275.76/x
  3. Step 3: Cross multiply
    20,819.30x = 28,740.02 × 13,275.76
  4. Step 4: Simplify right side
    20,819.30x = 381,545,607.92
  5. Step 5: Solve for x
    x = 381,545,607.92/20,819.30
  6. Step 6: Final answer
    x = 18,326.53

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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.