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Finding the Fourth Proportional to 31,411, 43,344.48 and 18,488.91

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Solution

The fourth proportional to 31,411, 43,344.48 and 18,488.91 is: 25,513.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,411 : 43,344.48 = 18,488.91 : x
  2. Step 2: Convert to fraction form
    31,411/43,344.48 = 18,488.91/x
  3. Step 3: Cross multiply
    31,411x = 43,344.48 × 18,488.91
  4. Step 4: Simplify right side
    31,411x = 801,392,189.72
  5. Step 5: Solve for x
    x = 801,392,189.72/31,411
  6. Step 6: Final answer
    x = 25,513.11

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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.