Home / 15,742.50-21,724.14-8,668.74

Finding the Fourth Proportional to 15,742.50, 21,724.14 and 8,668.74

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Solution

The fourth proportional to 15,742.50, 21,724.14 and 8,668.74 is: 11,962.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.50 : 21,724.14 = 8,668.74 : x
  2. Step 2: Convert to fraction form
    15,742.50/21,724.14 = 8,668.74/x
  3. Step 3: Cross multiply
    15,742.50x = 21,724.14 × 8,668.74
  4. Step 4: Simplify right side
    15,742.50x = 188,320,921.38
  5. Step 5: Solve for x
    x = 188,320,921.38/15,742.50
  6. Step 6: Final answer
    x = 11,962.58

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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.