Home / 12,724.49-17,555.72-7,690.20

Finding the Fourth Proportional to 12,724.49, 17,555.72 and 7,690.20

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Solution

The fourth proportional to 12,724.49, 17,555.72 and 7,690.20 is: 10,610.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,724.49 : 17,555.72 = 7,690.20 : x
  2. Step 2: Convert to fraction form
    12,724.49/17,555.72 = 7,690.20/x
  3. Step 3: Cross multiply
    12,724.49x = 17,555.72 × 7,690.20
  4. Step 4: Simplify right side
    12,724.49x = 135,006,959.49
  5. Step 5: Solve for x
    x = 135,006,959.49/12,724.49
  6. Step 6: Final answer
    x = 10,610.01

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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.