Home / 20,518.95-30,781.72-8,672.84

Finding the Fourth Proportional to 20,518.95, 30,781.72 and 8,672.84

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Solution

The fourth proportional to 20,518.95, 30,781.72 and 8,672.84 is: 13,010.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.95 : 30,781.72 = 8,672.84 : x
  2. Step 2: Convert to fraction form
    20,518.95/30,781.72 = 8,672.84/x
  3. Step 3: Cross multiply
    20,518.95x = 30,781.72 × 8,672.84
  4. Step 4: Simplify right side
    20,518.95x = 266,964,932.48
  5. Step 5: Solve for x
    x = 266,964,932.48/20,518.95
  6. Step 6: Final answer
    x = 13,010.65

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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.