Home / 20,726.40-31,078.20-14,160

Finding the Fourth Proportional to 20,726.40, 31,078.20 and 14,160

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Solution

The fourth proportional to 20,726.40, 31,078.20 and 14,160 is: 21,232.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.40 : 31,078.20 = 14,160 : x
  2. Step 2: Convert to fraction form
    20,726.40/31,078.20 = 14,160/x
  3. Step 3: Cross multiply
    20,726.40x = 31,078.20 × 14,160
  4. Step 4: Simplify right side
    20,726.40x = 440,067,312
  5. Step 5: Solve for x
    x = 440,067,312/20,726.40
  6. Step 6: Final answer
    x = 21,232.21

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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.