Home / 31,460.40-43,392.52-21,371.20

Finding the Fourth Proportional to 31,460.40, 43,392.52 and 21,371.20

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Solution

The fourth proportional to 31,460.40, 43,392.52 and 21,371.20 is: 29,476.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,460.40 : 43,392.52 = 21,371.20 : x
  2. Step 2: Convert to fraction form
    31,460.40/43,392.52 = 21,371.20/x
  3. Step 3: Cross multiply
    31,460.40x = 43,392.52 × 21,371.20
  4. Step 4: Simplify right side
    31,460.40x = 927,350,223.42
  5. Step 5: Solve for x
    x = 927,350,223.42/31,460.40
  6. Step 6: Final answer
    x = 29,476.75

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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.