Home / 20,899.31-31,359.71-13,884.17

Finding the Fourth Proportional to 20,899.31, 31,359.71 and 13,884.17

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Solution

The fourth proportional to 20,899.31, 31,359.71 and 13,884.17 is: 20,833.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.31 : 31,359.71 = 13,884.17 : x
  2. Step 2: Convert to fraction form
    20,899.31/31,359.71 = 13,884.17/x
  3. Step 3: Cross multiply
    20,899.31x = 31,359.71 × 13,884.17
  4. Step 4: Simplify right side
    20,899.31x = 435,403,318.57
  5. Step 5: Solve for x
    x = 435,403,318.57/20,899.31
  6. Step 6: Final answer
    x = 20,833.39

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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.