Home / 28,255.24-38,990.28-15,679

Finding the Fourth Proportional to 28,255.24, 38,990.28 and 15,679

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Solution

The fourth proportional to 28,255.24, 38,990.28 and 15,679 is: 21,635.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.24 : 38,990.28 = 15,679 : x
  2. Step 2: Convert to fraction form
    28,255.24/38,990.28 = 15,679/x
  3. Step 3: Cross multiply
    28,255.24x = 38,990.28 × 15,679
  4. Step 4: Simplify right side
    28,255.24x = 611,328,600.12
  5. Step 5: Solve for x
    x = 611,328,600.12/28,255.24
  6. Step 6: Final answer
    x = 21,635.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.