Home / 12,431.52-18,744.92-11,398.40

Finding the Fourth Proportional to 12,431.52, 18,744.92 and 11,398.40

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Solution

The fourth proportional to 12,431.52, 18,744.92 and 11,398.40 is: 17,187.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.52 : 18,744.92 = 11,398.40 : x
  2. Step 2: Convert to fraction form
    12,431.52/18,744.92 = 11,398.40/x
  3. Step 3: Cross multiply
    12,431.52x = 18,744.92 × 11,398.40
  4. Step 4: Simplify right side
    12,431.52x = 213,662,096.13
  5. Step 5: Solve for x
    x = 213,662,096.13/12,431.52
  6. Step 6: Final answer
    x = 17,187.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.