Home / 21,002.68-31,512.73-8,519.57

Finding the Fourth Proportional to 21,002.68, 31,512.73 and 8,519.57

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Solution

The fourth proportional to 21,002.68, 31,512.73 and 8,519.57 is: 12,782.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.68 : 31,512.73 = 8,519.57 : x
  2. Step 2: Convert to fraction form
    21,002.68/31,512.73 = 8,519.57/x
  3. Step 3: Cross multiply
    21,002.68x = 31,512.73 × 8,519.57
  4. Step 4: Simplify right side
    21,002.68x = 268,474,909.13
  5. Step 5: Solve for x
    x = 268,474,909.13/21,002.68
  6. Step 6: Final answer
    x = 12,782.89

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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.