Home / 21,380.88-32,053.02-12,479.76

Finding the Fourth Proportional to 21,380.88, 32,053.02 and 12,479.76

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Solution

The fourth proportional to 21,380.88, 32,053.02 and 12,479.76 is: 18,708.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.88 : 32,053.02 = 12,479.76 : x
  2. Step 2: Convert to fraction form
    21,380.88/32,053.02 = 12,479.76/x
  3. Step 3: Cross multiply
    21,380.88x = 32,053.02 × 12,479.76
  4. Step 4: Simplify right side
    21,380.88x = 400,013,996.88
  5. Step 5: Solve for x
    x = 400,013,996.88/21,380.88
  6. Step 6: Final answer
    x = 18,708.96

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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.