Home / 18,720.42-28,080.54-5,572.80

Finding the Fourth Proportional to 18,720.42, 28,080.54 and 5,572.80

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Solution

The fourth proportional to 18,720.42, 28,080.54 and 5,572.80 is: 8,359.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.42 : 28,080.54 = 5,572.80 : x
  2. Step 2: Convert to fraction form
    18,720.42/28,080.54 = 5,572.80/x
  3. Step 3: Cross multiply
    18,720.42x = 28,080.54 × 5,572.80
  4. Step 4: Simplify right side
    18,720.42x = 156,487,233.31
  5. Step 5: Solve for x
    x = 156,487,233.31/18,720.42
  6. Step 6: Final answer
    x = 8,359.17

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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.