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Finding the Fourth Proportional to 18,482.40, 25,479.36 and 11,404.08

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Solution

The fourth proportional to 18,482.40, 25,479.36 and 11,404.08 is: 15,721.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,482.40 : 25,479.36 = 11,404.08 : x
  2. Step 2: Convert to fraction form
    18,482.40/25,479.36 = 11,404.08/x
  3. Step 3: Cross multiply
    18,482.40x = 25,479.36 × 11,404.08
  4. Step 4: Simplify right side
    18,482.40x = 290,568,659.79
  5. Step 5: Solve for x
    x = 290,568,659.79/18,482.40
  6. Step 6: Final answer
    x = 15,721.37

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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.