Home / 20,940.48-31,397.76-10,931.04

Finding the Fourth Proportional to 20,940.48, 31,397.76 and 10,931.04

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Solution

The fourth proportional to 20,940.48, 31,397.76 and 10,931.04 is: 16,389.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.48 : 31,397.76 = 10,931.04 : x
  2. Step 2: Convert to fraction form
    20,940.48/31,397.76 = 10,931.04/x
  3. Step 3: Cross multiply
    20,940.48x = 31,397.76 × 10,931.04
  4. Step 4: Simplify right side
    20,940.48x = 343,210,170.47
  5. Step 5: Solve for x
    x = 343,210,170.47/20,940.48
  6. Step 6: Final answer
    x = 16,389.79

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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.