Home / 28,218.96-42,312.24-18,869.70

Finding the Fourth Proportional to 28,218.96, 42,312.24 and 18,869.70

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Solution

The fourth proportional to 28,218.96, 42,312.24 and 18,869.70 is: 28,293.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.96 : 42,312.24 = 18,869.70 : x
  2. Step 2: Convert to fraction form
    28,218.96/42,312.24 = 18,869.70/x
  3. Step 3: Cross multiply
    28,218.96x = 42,312.24 × 18,869.70
  4. Step 4: Simplify right side
    28,218.96x = 798,419,275.13
  5. Step 5: Solve for x
    x = 798,419,275.13/28,218.96
  6. Step 6: Final answer
    x = 28,293.72

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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.