Home / 20,387.47-30,585.81-7,239.85

Finding the Fourth Proportional to 20,387.47, 30,585.81 and 7,239.85

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Solution

The fourth proportional to 20,387.47, 30,585.81 and 7,239.85 is: 10,861.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.47 : 30,585.81 = 7,239.85 : x
  2. Step 2: Convert to fraction form
    20,387.47/30,585.81 = 7,239.85/x
  3. Step 3: Cross multiply
    20,387.47x = 30,585.81 × 7,239.85
  4. Step 4: Simplify right side
    20,387.47x = 221,436,676.53
  5. Step 5: Solve for x
    x = 221,436,676.53/20,387.47
  6. Step 6: Final answer
    x = 10,861.41

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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.