Home / 15,419.27-21,278.58-8,345.69

Finding the Fourth Proportional to 15,419.27, 21,278.58 and 8,345.69

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Solution

The fourth proportional to 15,419.27, 21,278.58 and 8,345.69 is: 11,517.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.27 : 21,278.58 = 8,345.69 : x
  2. Step 2: Convert to fraction form
    15,419.27/21,278.58 = 8,345.69/x
  3. Step 3: Cross multiply
    15,419.27x = 21,278.58 × 8,345.69
  4. Step 4: Simplify right side
    15,419.27x = 177,584,432.32
  5. Step 5: Solve for x
    x = 177,584,432.32/15,419.27
  6. Step 6: Final answer
    x = 11,517.05

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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.