Home / 21,234.09-31,820.90-15,643.47

Finding the Fourth Proportional to 21,234.09, 31,820.90 and 15,643.47

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Solution

The fourth proportional to 21,234.09, 31,820.90 and 15,643.47 is: 23,442.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,234.09 : 31,820.90 = 15,643.47 : x
  2. Step 2: Convert to fraction form
    21,234.09/31,820.90 = 15,643.47/x
  3. Step 3: Cross multiply
    21,234.09x = 31,820.90 × 15,643.47
  4. Step 4: Simplify right side
    21,234.09x = 497,789,294.52
  5. Step 5: Solve for x
    x = 497,789,294.52/21,234.09
  6. Step 6: Final answer
    x = 23,442.93

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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.