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Finding the Fourth Proportional to 31,507.76, 43,460.84 and 18,751.41

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Solution

The fourth proportional to 31,507.76, 43,460.84 and 18,751.41 is: 25,865.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,507.76 : 43,460.84 = 18,751.41 : x
  2. Step 2: Convert to fraction form
    31,507.76/43,460.84 = 18,751.41/x
  3. Step 3: Cross multiply
    31,507.76x = 43,460.84 × 18,751.41
  4. Step 4: Simplify right side
    31,507.76x = 814,952,044.68
  5. Step 5: Solve for x
    x = 814,952,044.68/31,507.76
  6. Step 6: Final answer
    x = 25,865.13

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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.