Home / 18,770.40-28,158.48-5,621.28

Finding the Fourth Proportional to 18,770.40, 28,158.48 and 5,621.28

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Solution

The fourth proportional to 18,770.40, 28,158.48 and 5,621.28 is: 8,432.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.40 : 28,158.48 = 5,621.28 : x
  2. Step 2: Convert to fraction form
    18,770.40/28,158.48 = 5,621.28/x
  3. Step 3: Cross multiply
    18,770.40x = 28,158.48 × 5,621.28
  4. Step 4: Simplify right side
    18,770.40x = 158,286,700.45
  5. Step 5: Solve for x
    x = 158,286,700.45/18,770.40
  6. Step 6: Final answer
    x = 8,432.78

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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.