Home / 18,956.13-28,434.20-5,105.13

Finding the Fourth Proportional to 18,956.13, 28,434.20 and 5,105.13

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Solution

The fourth proportional to 18,956.13, 28,434.20 and 5,105.13 is: 7,657.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.13 : 28,434.20 = 5,105.13 : x
  2. Step 2: Convert to fraction form
    18,956.13/28,434.20 = 5,105.13/x
  3. Step 3: Cross multiply
    18,956.13x = 28,434.20 × 5,105.13
  4. Step 4: Simplify right side
    18,956.13x = 145,160,287.45
  5. Step 5: Solve for x
    x = 145,160,287.45/18,956.13
  6. Step 6: Final answer
    x = 7,657.70

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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.