Home / 28,659.29-42,928.33-18,123.88

Finding the Fourth Proportional to 28,659.29, 42,928.33 and 18,123.88

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Solution

The fourth proportional to 28,659.29, 42,928.33 and 18,123.88 is: 27,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,659.29 : 42,928.33 = 18,123.88 : x
  2. Step 2: Convert to fraction form
    28,659.29/42,928.33 = 18,123.88/x
  3. Step 3: Cross multiply
    28,659.29x = 42,928.33 × 18,123.88
  4. Step 4: Simplify right side
    28,659.29x = 778,027,596.26
  5. Step 5: Solve for x
    x = 778,027,596.26/28,659.29
  6. Step 6: Final answer
    x = 27,147.48

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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.