Home / 28,390.20-39,136.46-18,180.15

Finding the Fourth Proportional to 28,390.20, 39,136.46 and 18,180.15

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Solution

The fourth proportional to 28,390.20, 39,136.46 and 18,180.15 is: 25,061.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.20 : 39,136.46 = 18,180.15 : x
  2. Step 2: Convert to fraction form
    28,390.20/39,136.46 = 18,180.15/x
  3. Step 3: Cross multiply
    28,390.20x = 39,136.46 × 18,180.15
  4. Step 4: Simplify right side
    28,390.20x = 711,506,713.27
  5. Step 5: Solve for x
    x = 711,506,713.27/28,390.20
  6. Step 6: Final answer
    x = 25,061.70

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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.