Home / 20,827.53-31,249.12-12,398.90

Finding the Fourth Proportional to 20,827.53, 31,249.12 and 12,398.90

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Solution

The fourth proportional to 20,827.53, 31,249.12 and 12,398.90 is: 18,603.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.53 : 31,249.12 = 12,398.90 : x
  2. Step 2: Convert to fraction form
    20,827.53/31,249.12 = 12,398.90/x
  3. Step 3: Cross multiply
    20,827.53x = 31,249.12 × 12,398.90
  4. Step 4: Simplify right side
    20,827.53x = 387,454,643.91
  5. Step 5: Solve for x
    x = 387,454,643.91/20,827.53
  6. Step 6: Final answer
    x = 18,603.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.