Home / 18,869.80-28,307.40-5,723.20

Finding the Fourth Proportional to 18,869.80, 28,307.40 and 5,723.20

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Solution

The fourth proportional to 18,869.80, 28,307.40 and 5,723.20 is: 8,585.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.80 : 28,307.40 = 5,723.20 : x
  2. Step 2: Convert to fraction form
    18,869.80/28,307.40 = 5,723.20/x
  3. Step 3: Cross multiply
    18,869.80x = 28,307.40 × 5,723.20
  4. Step 4: Simplify right side
    18,869.80x = 162,008,911.68
  5. Step 5: Solve for x
    x = 162,008,911.68/18,869.80
  6. Step 6: Final answer
    x = 8,585.62

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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.