Home / 28,131.68-42,202.72-9,409.92

Finding the Fourth Proportional to 28,131.68, 42,202.72 and 9,409.92

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Solution

The fourth proportional to 28,131.68, 42,202.72 and 9,409.92 is: 14,116.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.68 : 42,202.72 = 9,409.92 : x
  2. Step 2: Convert to fraction form
    28,131.68/42,202.72 = 9,409.92/x
  3. Step 3: Cross multiply
    28,131.68x = 42,202.72 × 9,409.92
  4. Step 4: Simplify right side
    28,131.68x = 397,124,218.98
  5. Step 5: Solve for x
    x = 397,124,218.98/28,131.68
  6. Step 6: Final answer
    x = 14,116.62

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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.