Home / 20,343.20-28,059.12-18,670

Finding the Fourth Proportional to 20,343.20, 28,059.12 and 18,670

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Solution

The fourth proportional to 20,343.20, 28,059.12 and 18,670 is: 25,751.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.20 : 28,059.12 = 18,670 : x
  2. Step 2: Convert to fraction form
    20,343.20/28,059.12 = 18,670/x
  3. Step 3: Cross multiply
    20,343.20x = 28,059.12 × 18,670
  4. Step 4: Simplify right side
    20,343.20x = 523,863,770.40
  5. Step 5: Solve for x
    x = 523,863,770.40/20,343.20
  6. Step 6: Final answer
    x = 25,751.30

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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.