Home / 21,179.87-29,229.56-12,227.95

Finding the Fourth Proportional to 21,179.87, 29,229.56 and 12,227.95

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Solution

The fourth proportional to 21,179.87, 29,229.56 and 12,227.95 is: 16,875.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.87 : 29,229.56 = 12,227.95 : x
  2. Step 2: Convert to fraction form
    21,179.87/29,229.56 = 12,227.95/x
  3. Step 3: Cross multiply
    21,179.87x = 29,229.56 × 12,227.95
  4. Step 4: Simplify right side
    21,179.87x = 357,417,598.20
  5. Step 5: Solve for x
    x = 357,417,598.20/21,179.87
  6. Step 6: Final answer
    x = 16,875.34

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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.