Home / 21,581.80-32,307.90-12,812.20

Finding the Fourth Proportional to 21,581.80, 32,307.90 and 12,812.20

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Solution

The fourth proportional to 21,581.80, 32,307.90 and 12,812.20 is: 19,179.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581.80 : 32,307.90 = 12,812.20 : x
  2. Step 2: Convert to fraction form
    21,581.80/32,307.90 = 12,812.20/x
  3. Step 3: Cross multiply
    21,581.80x = 32,307.90 × 12,812.20
  4. Step 4: Simplify right side
    21,581.80x = 413,935,276.38
  5. Step 5: Solve for x
    x = 413,935,276.38/21,581.80
  6. Step 6: Final answer
    x = 19,179.83

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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.