Home / 20,434.28-30,527.20-12,979.04

Finding the Fourth Proportional to 20,434.28, 30,527.20 and 12,979.04

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Solution

The fourth proportional to 20,434.28, 30,527.20 and 12,979.04 is: 19,389.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.28 : 30,527.20 = 12,979.04 : x
  2. Step 2: Convert to fraction form
    20,434.28/30,527.20 = 12,979.04/x
  3. Step 3: Cross multiply
    20,434.28x = 30,527.20 × 12,979.04
  4. Step 4: Simplify right side
    20,434.28x = 396,213,749.89
  5. Step 5: Solve for x
    x = 396,213,749.89/20,434.28
  6. Step 6: Final answer
    x = 19,389.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.