Home / 18,720.42-25,833.15-11,646.78

Finding the Fourth Proportional to 18,720.42, 25,833.15 and 11,646.78

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Solution

The fourth proportional to 18,720.42, 25,833.15 and 11,646.78 is: 16,071.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.42 : 25,833.15 = 11,646.78 : x
  2. Step 2: Convert to fraction form
    18,720.42/25,833.15 = 11,646.78/x
  3. Step 3: Cross multiply
    18,720.42x = 25,833.15 × 11,646.78
  4. Step 4: Simplify right side
    18,720.42x = 300,873,014.76
  5. Step 5: Solve for x
    x = 300,873,014.76/18,720.42
  6. Step 6: Final answer
    x = 16,071.92

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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.