Home / 31,422.16-43,360-18,499.38

Finding the Fourth Proportional to 31,422.16, 43,360 and 18,499.38

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Solution

The fourth proportional to 31,422.16, 43,360 and 18,499.38 is: 25,527.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,422.16 : 43,360 = 18,499.38 : x
  2. Step 2: Convert to fraction form
    31,422.16/43,360 = 18,499.38/x
  3. Step 3: Cross multiply
    31,422.16x = 43,360 × 18,499.38
  4. Step 4: Simplify right side
    31,422.16x = 802,133,116.80
  5. Step 5: Solve for x
    x = 802,133,116.80/31,422.16
  6. Step 6: Final answer
    x = 25,527.62

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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.