Home / 31,290.76-43,179.64-17,143.30

Finding the Fourth Proportional to 31,290.76, 43,179.64 and 17,143.30

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Solution

The fourth proportional to 31,290.76, 43,179.64 and 17,143.30 is: 23,656.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,290.76 : 43,179.64 = 17,143.30 : x
  2. Step 2: Convert to fraction form
    31,290.76/43,179.64 = 17,143.30/x
  3. Step 3: Cross multiply
    31,290.76x = 43,179.64 × 17,143.30
  4. Step 4: Simplify right side
    31,290.76x = 740,241,522.41
  5. Step 5: Solve for x
    x = 740,241,522.41/31,290.76
  6. Step 6: Final answer
    x = 23,656.87

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Double scale
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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.