Home / 15,742.32-21,724.30-8,668.69

Finding the Fourth Proportional to 15,742.32, 21,724.30 and 8,668.69

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Solution

The fourth proportional to 15,742.32, 21,724.30 and 8,668.69 is: 11,962.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.32 : 21,724.30 = 8,668.69 : x
  2. Step 2: Convert to fraction form
    15,742.32/21,724.30 = 8,668.69/x
  3. Step 3: Cross multiply
    15,742.32x = 21,724.30 × 8,668.69
  4. Step 4: Simplify right side
    15,742.32x = 188,321,178.69
  5. Step 5: Solve for x
    x = 188,321,178.69/15,742.32
  6. Step 6: Final answer
    x = 11,962.74

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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.