Home / 10,278.80-15,405.42-5,345.54

Finding the Fourth Proportional to 10,278.80, 15,405.42 and 5,345.54

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Solution

The fourth proportional to 10,278.80, 15,405.42 and 5,345.54 is: 8,011.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,278.80 : 15,405.42 = 5,345.54 : x
  2. Step 2: Convert to fraction form
    10,278.80/15,405.42 = 5,345.54/x
  3. Step 3: Cross multiply
    10,278.80x = 15,405.42 × 5,345.54
  4. Step 4: Simplify right side
    10,278.80x = 82,350,288.83
  5. Step 5: Solve for x
    x = 82,350,288.83/10,278.80
  6. Step 6: Final answer
    x = 8,011.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.