Home / 15,376.90-21,222.13-8,663.82

Finding the Fourth Proportional to 15,376.90, 21,222.13 and 8,663.82

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Solution

The fourth proportional to 15,376.90, 21,222.13 and 8,663.82 is: 11,957.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,376.90 : 21,222.13 = 8,663.82 : x
  2. Step 2: Convert to fraction form
    15,376.90/21,222.13 = 8,663.82/x
  3. Step 3: Cross multiply
    15,376.90x = 21,222.13 × 8,663.82
  4. Step 4: Simplify right side
    15,376.90x = 183,864,714.34
  5. Step 5: Solve for x
    x = 183,864,714.34/15,376.90
  6. Step 6: Final answer
    x = 11,957.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.