Home / 31,103.03-42,909.26-18,351.15

Finding the Fourth Proportional to 31,103.03, 42,909.26 and 18,351.15

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Solution

The fourth proportional to 31,103.03, 42,909.26 and 18,351.15 is: 25,316.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,103.03 : 42,909.26 = 18,351.15 : x
  2. Step 2: Convert to fraction form
    31,103.03/42,909.26 = 18,351.15/x
  3. Step 3: Cross multiply
    31,103.03x = 42,909.26 × 18,351.15
  4. Step 4: Simplify right side
    31,103.03x = 787,434,266.65
  5. Step 5: Solve for x
    x = 787,434,266.65/31,103.03
  6. Step 6: Final answer
    x = 25,316.96

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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.