Home / 21,294.90-31,948.52-8,812.62

Finding the Fourth Proportional to 21,294.90, 31,948.52 and 8,812.62

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Solution

The fourth proportional to 21,294.90, 31,948.52 and 8,812.62 is: 13,221.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,294.90 : 31,948.52 = 8,812.62 : x
  2. Step 2: Convert to fraction form
    21,294.90/31,948.52 = 8,812.62/x
  3. Step 3: Cross multiply
    21,294.90x = 31,948.52 × 8,812.62
  4. Step 4: Simplify right side
    21,294.90x = 281,550,122.26
  5. Step 5: Solve for x
    x = 281,550,122.26/21,294.90
  6. Step 6: Final answer
    x = 13,221.48

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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.