Home / 18,615.31-25,678.72-11,440.23

Finding the Fourth Proportional to 18,615.31, 25,678.72 and 11,440.23

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Solution

The fourth proportional to 18,615.31, 25,678.72 and 11,440.23 is: 15,781.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.31 : 25,678.72 = 11,440.23 : x
  2. Step 2: Convert to fraction form
    18,615.31/25,678.72 = 11,440.23/x
  3. Step 3: Cross multiply
    18,615.31x = 25,678.72 × 11,440.23
  4. Step 4: Simplify right side
    18,615.31x = 293,770,462.91
  5. Step 5: Solve for x
    x = 293,770,462.91/18,615.31
  6. Step 6: Final answer
    x = 15,781.12

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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.