Home / 30,937.71-42,691.68-18,191.41

Finding the Fourth Proportional to 30,937.71, 42,691.68 and 18,191.41

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Solution

The fourth proportional to 30,937.71, 42,691.68 and 18,191.41 is: 25,102.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,937.71 : 42,691.68 = 18,191.41 : x
  2. Step 2: Convert to fraction form
    30,937.71/42,691.68 = 18,191.41/x
  3. Step 3: Cross multiply
    30,937.71x = 42,691.68 × 18,191.41
  4. Step 4: Simplify right side
    30,937.71x = 776,621,854.47
  5. Step 5: Solve for x
    x = 776,621,854.47/30,937.71
  6. Step 6: Final answer
    x = 25,102.76

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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.