Home / 31,443.76-43,388.45-21,256.96

Finding the Fourth Proportional to 31,443.76, 43,388.45 and 21,256.96

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Solution

The fourth proportional to 31,443.76, 43,388.45 and 21,256.96 is: 29,331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,443.76 : 43,388.45 = 21,256.96 : x
  2. Step 2: Convert to fraction form
    31,443.76/43,388.45 = 21,256.96/x
  3. Step 3: Cross multiply
    31,443.76x = 43,388.45 × 21,256.96
  4. Step 4: Simplify right side
    31,443.76x = 922,306,546.11
  5. Step 5: Solve for x
    x = 922,306,546.11/31,443.76
  6. Step 6: Final answer
    x = 29,331.94

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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.