Home / 18,765.29-28,143.72-5,615.97

Finding the Fourth Proportional to 18,765.29, 28,143.72 and 5,615.97

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Solution

The fourth proportional to 18,765.29, 28,143.72 and 5,615.97 is: 8,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.29 : 28,143.72 = 5,615.97 : x
  2. Step 2: Convert to fraction form
    18,765.29/28,143.72 = 5,615.97/x
  3. Step 3: Cross multiply
    18,765.29x = 28,143.72 × 5,615.97
  4. Step 4: Simplify right side
    18,765.29x = 158,054,287.21
  5. Step 5: Solve for x
    x = 158,054,287.21/18,765.29
  6. Step 6: Final answer
    x = 8,422.70

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1.5x scale

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.