Home / 21,127.38-29,158.91-12,173.18

Finding the Fourth Proportional to 21,127.38, 29,158.91 and 12,173.18

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Solution

The fourth proportional to 21,127.38, 29,158.91 and 12,173.18 is: 16,800.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.38 : 29,158.91 = 12,173.18 : x
  2. Step 2: Convert to fraction form
    21,127.38/29,158.91 = 12,173.18/x
  3. Step 3: Cross multiply
    21,127.38x = 29,158.91 × 12,173.18
  4. Step 4: Simplify right side
    21,127.38x = 354,956,660.03
  5. Step 5: Solve for x
    x = 354,956,660.03/21,127.38
  6. Step 6: Final answer
    x = 16,800.79

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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.