Home / 31,538.95-43,521.78-18,100.75

Finding the Fourth Proportional to 31,538.95, 43,521.78 and 18,100.75

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Solution

The fourth proportional to 31,538.95, 43,521.78 and 18,100.75 is: 24,977.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,538.95 : 43,521.78 = 18,100.75 : x
  2. Step 2: Convert to fraction form
    31,538.95/43,521.78 = 18,100.75/x
  3. Step 3: Cross multiply
    31,538.95x = 43,521.78 × 18,100.75
  4. Step 4: Simplify right side
    31,538.95x = 787,776,859.34
  5. Step 5: Solve for x
    x = 787,776,859.34/31,538.95
  6. Step 6: Final answer
    x = 24,977.90

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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.