Home / 20,531.27-28,333.29-12,981.01

Finding the Fourth Proportional to 20,531.27, 28,333.29 and 12,981.01

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Solution

The fourth proportional to 20,531.27, 28,333.29 and 12,981.01 is: 17,913.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.27 : 28,333.29 = 12,981.01 : x
  2. Step 2: Convert to fraction form
    20,531.27/28,333.29 = 12,981.01/x
  3. Step 3: Cross multiply
    20,531.27x = 28,333.29 × 12,981.01
  4. Step 4: Simplify right side
    20,531.27x = 367,794,720.82
  5. Step 5: Solve for x
    x = 367,794,720.82/20,531.27
  6. Step 6: Final answer
    x = 17,913.88

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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.