Home / 20,878.97-31,239.98-14,651.13

Finding the Fourth Proportional to 20,878.97, 31,239.98 and 14,651.13

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Solution

The fourth proportional to 20,878.97, 31,239.98 and 14,651.13 is: 21,921.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.97 : 31,239.98 = 14,651.13 : x
  2. Step 2: Convert to fraction form
    20,878.97/31,239.98 = 14,651.13/x
  3. Step 3: Cross multiply
    20,878.97x = 31,239.98 × 14,651.13
  4. Step 4: Simplify right side
    20,878.97x = 457,701,008.18
  5. Step 5: Solve for x
    x = 457,701,008.18/20,878.97
  6. Step 6: Final answer
    x = 21,921.63

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1.5x scale

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.