Home / 20,868.25-31,281.49-10,345.97

Finding the Fourth Proportional to 20,868.25, 31,281.49 and 10,345.97

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Solution

The fourth proportional to 20,868.25, 31,281.49 and 10,345.97 is: 15,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.25 : 31,281.49 = 10,345.97 : x
  2. Step 2: Convert to fraction form
    20,868.25/31,281.49 = 10,345.97/x
  3. Step 3: Cross multiply
    20,868.25x = 31,281.49 × 10,345.97
  4. Step 4: Simplify right side
    20,868.25x = 323,637,253.03
  5. Step 5: Solve for x
    x = 323,637,253.03/20,868.25
  6. Step 6: Final answer
    x = 15,508.60

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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.