Home / 31,680.50-43,719.09-18,432.50

Finding the Fourth Proportional to 31,680.50, 43,719.09 and 18,432.50

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Solution

The fourth proportional to 31,680.50, 43,719.09 and 18,432.50 is: 25,436.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,680.50 : 43,719.09 = 18,432.50 : x
  2. Step 2: Convert to fraction form
    31,680.50/43,719.09 = 18,432.50/x
  3. Step 3: Cross multiply
    31,680.50x = 43,719.09 × 18,432.50
  4. Step 4: Simplify right side
    31,680.50x = 805,852,126.43
  5. Step 5: Solve for x
    x = 805,852,126.43/31,680.50
  6. Step 6: Final answer
    x = 25,436.85

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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.