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Finding the Fourth Proportional to 10,668.88, 15,989.16 and 5,670.20

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Solution

The fourth proportional to 10,668.88, 15,989.16 and 5,670.20 is: 8,497.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,668.88 : 15,989.16 = 5,670.20 : x
  2. Step 2: Convert to fraction form
    10,668.88/15,989.16 = 5,670.20/x
  3. Step 3: Cross multiply
    10,668.88x = 15,989.16 × 5,670.20
  4. Step 4: Simplify right side
    10,668.88x = 90,661,735.03
  5. Step 5: Solve for x
    x = 90,661,735.03/10,668.88
  6. Step 6: Final answer
    x = 8,497.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.