Home / 28,819.52-39,777.12-18,202.40

Finding the Fourth Proportional to 28,819.52, 39,777.12 and 18,202.40

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Solution

The fourth proportional to 28,819.52, 39,777.12 and 18,202.40 is: 25,123.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,819.52 : 39,777.12 = 18,202.40 : x
  2. Step 2: Convert to fraction form
    28,819.52/39,777.12 = 18,202.40/x
  3. Step 3: Cross multiply
    28,819.52x = 39,777.12 × 18,202.40
  4. Step 4: Simplify right side
    28,819.52x = 724,039,049.09
  5. Step 5: Solve for x
    x = 724,039,049.09/28,819.52
  6. Step 6: Final answer
    x = 25,123.22

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1.5x scale

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.