Home / 31,330.20-43,257.06-21,901.80

Finding the Fourth Proportional to 31,330.20, 43,257.06 and 21,901.80

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Solution

The fourth proportional to 31,330.20, 43,257.06 and 21,901.80 is: 30,239.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,330.20 : 43,257.06 = 21,901.80 : x
  2. Step 2: Convert to fraction form
    31,330.20/43,257.06 = 21,901.80/x
  3. Step 3: Cross multiply
    31,330.20x = 43,257.06 × 21,901.80
  4. Step 4: Simplify right side
    31,330.20x = 947,407,476.71
  5. Step 5: Solve for x
    x = 947,407,476.71/31,330.20
  6. Step 6: Final answer
    x = 30,239.43

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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.