Home / 18,656.12-25,740.78-15,112.68

Finding the Fourth Proportional to 18,656.12, 25,740.78 and 15,112.68

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Solution

The fourth proportional to 18,656.12, 25,740.78 and 15,112.68 is: 20,851.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,656.12 : 25,740.78 = 15,112.68 : x
  2. Step 2: Convert to fraction form
    18,656.12/25,740.78 = 15,112.68/x
  3. Step 3: Cross multiply
    18,656.12x = 25,740.78 × 15,112.68
  4. Step 4: Simplify right side
    18,656.12x = 389,012,171.09
  5. Step 5: Solve for x
    x = 389,012,171.09/18,656.12
  6. Step 6: Final answer
    x = 20,851.72

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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.