Home / 12,621.88-17,417.80-7,245.20

Finding the Fourth Proportional to 12,621.88, 17,417.80 and 7,245.20

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Solution

The fourth proportional to 12,621.88, 17,417.80 and 7,245.20 is: 9,998.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.88 : 17,417.80 = 7,245.20 : x
  2. Step 2: Convert to fraction form
    12,621.88/17,417.80 = 7,245.20/x
  3. Step 3: Cross multiply
    12,621.88x = 17,417.80 × 7,245.20
  4. Step 4: Simplify right side
    12,621.88x = 126,195,444.56
  5. Step 5: Solve for x
    x = 126,195,444.56/12,621.88
  6. Step 6: Final answer
    x = 9,998.15

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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.