Home / 35,491.88-48,981.30-20,387

Finding the Fourth Proportional to 35,491.88, 48,981.30 and 20,387

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Solution

The fourth proportional to 35,491.88, 48,981.30 and 20,387 is: 28,135.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,491.88 : 48,981.30 = 20,387 : x
  2. Step 2: Convert to fraction form
    35,491.88/48,981.30 = 20,387/x
  3. Step 3: Cross multiply
    35,491.88x = 48,981.30 × 20,387
  4. Step 4: Simplify right side
    35,491.88x = 998,581,763.10
  5. Step 5: Solve for x
    x = 998,581,763.10/35,491.88
  6. Step 6: Final answer
    x = 28,135.50

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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.