Home / 21,395.18-29,523.42-12,318.10

Finding the Fourth Proportional to 21,395.18, 29,523.42 and 12,318.10

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Solution

The fourth proportional to 21,395.18, 29,523.42 and 12,318.10 is: 16,997.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,395.18 : 29,523.42 = 12,318.10 : x
  2. Step 2: Convert to fraction form
    21,395.18/29,523.42 = 12,318.10/x
  3. Step 3: Cross multiply
    21,395.18x = 29,523.42 × 12,318.10
  4. Step 4: Simplify right side
    21,395.18x = 363,672,366.09
  5. Step 5: Solve for x
    x = 363,672,366.09/21,395.18
  6. Step 6: Final answer
    x = 16,997.87

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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.