Home / 20,825.13-31,237.60-5,242.76

Finding the Fourth Proportional to 20,825.13, 31,237.60 and 5,242.76

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Solution

The fourth proportional to 20,825.13, 31,237.60 and 5,242.76 is: 7,864.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.13 : 31,237.60 = 5,242.76 : x
  2. Step 2: Convert to fraction form
    20,825.13/31,237.60 = 5,242.76/x
  3. Step 3: Cross multiply
    20,825.13x = 31,237.60 × 5,242.76
  4. Step 4: Simplify right side
    20,825.13x = 163,771,239.78
  5. Step 5: Solve for x
    x = 163,771,239.78/20,825.13
  6. Step 6: Final answer
    x = 7,864.12

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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.