Home / 21,294.90-31,961.39-21,215.52

Finding the Fourth Proportional to 21,294.90, 31,961.39 and 21,215.52

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Solution

The fourth proportional to 21,294.90, 31,961.39 and 21,215.52 is: 31,842.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,294.90 : 31,961.39 = 21,215.52 : x
  2. Step 2: Convert to fraction form
    21,294.90/31,961.39 = 21,215.52/x
  3. Step 3: Cross multiply
    21,294.90x = 31,961.39 × 21,215.52
  4. Step 4: Simplify right side
    21,294.90x = 678,077,402.70
  5. Step 5: Solve for x
    x = 678,077,402.70/21,294.90
  6. Step 6: Final answer
    x = 31,842.24

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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.