Home / 18,979.23-28,445.74-13,434.18

Finding the Fourth Proportional to 18,979.23, 28,445.74 and 13,434.18

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Solution

The fourth proportional to 18,979.23, 28,445.74 and 13,434.18 is: 20,134.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.23 : 28,445.74 = 13,434.18 : x
  2. Step 2: Convert to fraction form
    18,979.23/28,445.74 = 13,434.18/x
  3. Step 3: Cross multiply
    18,979.23x = 28,445.74 × 13,434.18
  4. Step 4: Simplify right side
    18,979.23x = 382,145,191.39
  5. Step 5: Solve for x
    x = 382,145,191.39/18,979.23
  6. Step 6: Final answer
    x = 20,134.92

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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.