Home / 10,987.24-15,159.78-6,680.20

Finding the Fourth Proportional to 10,987.24, 15,159.78 and 6,680.20

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Solution

The fourth proportional to 10,987.24, 15,159.78 and 6,680.20 is: 9,217.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.24 : 15,159.78 = 6,680.20 : x
  2. Step 2: Convert to fraction form
    10,987.24/15,159.78 = 6,680.20/x
  3. Step 3: Cross multiply
    10,987.24x = 15,159.78 × 6,680.20
  4. Step 4: Simplify right side
    10,987.24x = 101,270,362.36
  5. Step 5: Solve for x
    x = 101,270,362.36/10,987.24
  6. Step 6: Final answer
    x = 9,217.09

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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.