Home / 20,742.98-31,094.78-8,270.66

Finding the Fourth Proportional to 20,742.98, 31,094.78 and 8,270.66

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Solution

The fourth proportional to 20,742.98, 31,094.78 and 8,270.66 is: 12,398.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.98 : 31,094.78 = 8,270.66 : x
  2. Step 2: Convert to fraction form
    20,742.98/31,094.78 = 8,270.66/x
  3. Step 3: Cross multiply
    20,742.98x = 31,094.78 × 8,270.66
  4. Step 4: Simplify right side
    20,742.98x = 257,174,156.33
  5. Step 5: Solve for x
    x = 257,174,156.33/20,742.98
  6. Step 6: Final answer
    x = 12,398.13

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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.