Home / 21,560.89-29,753.99-12,129.45

Finding the Fourth Proportional to 21,560.89, 29,753.99 and 12,129.45

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Solution

The fourth proportional to 21,560.89, 29,753.99 and 12,129.45 is: 16,738.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,560.89 : 29,753.99 = 12,129.45 : x
  2. Step 2: Convert to fraction form
    21,560.89/29,753.99 = 12,129.45/x
  3. Step 3: Cross multiply
    21,560.89x = 29,753.99 × 12,129.45
  4. Step 4: Simplify right side
    21,560.89x = 360,899,624.20
  5. Step 5: Solve for x
    x = 360,899,624.20/21,560.89
  6. Step 6: Final answer
    x = 16,738.62

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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.