Home / 15,419.15-21,278.46-8,345.62

Finding the Fourth Proportional to 15,419.15, 21,278.46 and 8,345.62

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Solution

The fourth proportional to 15,419.15, 21,278.46 and 8,345.62 is: 11,516.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.15 : 21,278.46 = 8,345.62 : x
  2. Step 2: Convert to fraction form
    15,419.15/21,278.46 = 8,345.62/x
  3. Step 3: Cross multiply
    15,419.15x = 21,278.46 × 8,345.62
  4. Step 4: Simplify right side
    15,419.15x = 177,581,941.35
  5. Step 5: Solve for x
    x = 177,581,941.35/15,419.15
  6. Step 6: Final answer
    x = 11,516.97

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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.