Home / 20,837.09-31,247.21-7,686.53

Finding the Fourth Proportional to 20,837.09, 31,247.21 and 7,686.53

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Solution

The fourth proportional to 20,837.09, 31,247.21 and 7,686.53 is: 11,526.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.09 : 31,247.21 = 7,686.53 : x
  2. Step 2: Convert to fraction form
    20,837.09/31,247.21 = 7,686.53/x
  3. Step 3: Cross multiply
    20,837.09x = 31,247.21 × 7,686.53
  4. Step 4: Simplify right side
    20,837.09x = 240,182,422.41
  5. Step 5: Solve for x
    x = 240,182,422.41/20,837.09
  6. Step 6: Final answer
    x = 11,526.68

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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.