Home / 28,538.70-42,820.20-18,016.80

Finding the Fourth Proportional to 28,538.70, 42,820.20 and 18,016.80

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Solution

The fourth proportional to 28,538.70, 42,820.20 and 18,016.80 is: 27,032.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,538.70 : 42,820.20 = 18,016.80 : x
  2. Step 2: Convert to fraction form
    28,538.70/42,820.20 = 18,016.80/x
  3. Step 3: Cross multiply
    28,538.70x = 42,820.20 × 18,016.80
  4. Step 4: Simplify right side
    28,538.70x = 771,482,979.36
  5. Step 5: Solve for x
    x = 771,482,979.36/28,538.70
  6. Step 6: Final answer
    x = 27,032.87

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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.