Home / 15,781.78-23,666.49-5,915.67

Finding the Fourth Proportional to 15,781.78, 23,666.49 and 5,915.67

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Solution

The fourth proportional to 15,781.78, 23,666.49 and 5,915.67 is: 8,871.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.78 : 23,666.49 = 5,915.67 : x
  2. Step 2: Convert to fraction form
    15,781.78/23,666.49 = 5,915.67/x
  3. Step 3: Cross multiply
    15,781.78x = 23,666.49 × 5,915.67
  4. Step 4: Simplify right side
    15,781.78x = 140,003,233.65
  5. Step 5: Solve for x
    x = 140,003,233.65/15,781.78
  6. Step 6: Final answer
    x = 8,871.20

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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.