Home / 18,612.97-25,686-10,115.16

Finding the Fourth Proportional to 18,612.97, 25,686 and 10,115.16

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Solution

The fourth proportional to 18,612.97, 25,686 and 10,115.16 is: 13,958.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.97 : 25,686 = 10,115.16 : x
  2. Step 2: Convert to fraction form
    18,612.97/25,686 = 10,115.16/x
  3. Step 3: Cross multiply
    18,612.97x = 25,686 × 10,115.16
  4. Step 4: Simplify right side
    18,612.97x = 259,817,999.76
  5. Step 5: Solve for x
    x = 259,817,999.76/18,612.97
  6. Step 6: Final answer
    x = 13,958.98

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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.