Home / 31,531.86-43,515.36-18,103.68

Finding the Fourth Proportional to 31,531.86, 43,515.36 and 18,103.68

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Solution

The fourth proportional to 31,531.86, 43,515.36 and 18,103.68 is: 24,983.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,531.86 : 43,515.36 = 18,103.68 : x
  2. Step 2: Convert to fraction form
    31,531.86/43,515.36 = 18,103.68/x
  3. Step 3: Cross multiply
    31,531.86x = 43,515.36 × 18,103.68
  4. Step 4: Simplify right side
    31,531.86x = 787,788,152.52
  5. Step 5: Solve for x
    x = 787,788,152.52/31,531.86
  6. Step 6: Final answer
    x = 24,983.88

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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.