Home / 21,270.89-31,906.33-5,688.11

Finding the Fourth Proportional to 21,270.89, 31,906.33 and 5,688.11

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Solution

The fourth proportional to 21,270.89, 31,906.33 and 5,688.11 is: 8,532.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.89 : 31,906.33 = 5,688.11 : x
  2. Step 2: Convert to fraction form
    21,270.89/31,906.33 = 5,688.11/x
  3. Step 3: Cross multiply
    21,270.89x = 31,906.33 × 5,688.11
  4. Step 4: Simplify right side
    21,270.89x = 181,486,714.74
  5. Step 5: Solve for x
    x = 181,486,714.74/21,270.89
  6. Step 6: Final answer
    x = 8,532.16

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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.