Home / 21,234.33-31,821.27-15,643.71

Finding the Fourth Proportional to 21,234.33, 31,821.27 and 15,643.71

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Solution

The fourth proportional to 21,234.33, 31,821.27 and 15,643.71 is: 23,443.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.33 : 31,821.27 = 15,643.71 : x
  2. Step 2: Convert to fraction form
    21,234.33/31,821.27 = 15,643.71/x
  3. Step 3: Cross multiply
    21,234.33x = 31,821.27 × 15,643.71
  4. Step 4: Simplify right side
    21,234.33x = 497,802,719.71
  5. Step 5: Solve for x
    x = 497,802,719.71/21,234.33
  6. Step 6: Final answer
    x = 23,443.30

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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.