Home / 20,685.63-28,575.25-18,446.79

Finding the Fourth Proportional to 20,685.63, 28,575.25 and 18,446.79

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Solution

The fourth proportional to 20,685.63, 28,575.25 and 18,446.79 is: 25,482.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.63 : 28,575.25 = 18,446.79 : x
  2. Step 2: Convert to fraction form
    20,685.63/28,575.25 = 18,446.79/x
  3. Step 3: Cross multiply
    20,685.63x = 28,575.25 × 18,446.79
  4. Step 4: Simplify right side
    20,685.63x = 527,121,635.95
  5. Step 5: Solve for x
    x = 527,121,635.95/20,685.63
  6. Step 6: Final answer
    x = 25,482.50

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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.