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Finding the Fourth Proportional to 7,125.20, 10,668.60 and 7,125.20

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Solution

The fourth proportional to 7,125.20, 10,668.60 and 7,125.20 is: 10,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.20 : 10,668.60 = 7,125.20 : x
  2. Step 2: Convert to fraction form
    7,125.20/10,668.60 = 7,125.20/x
  3. Step 3: Cross multiply
    7,125.20x = 10,668.60 × 7,125.20
  4. Step 4: Simplify right side
    7,125.20x = 76,015,908.72
  5. Step 5: Solve for x
    x = 76,015,908.72/7,125.20
  6. Step 6: Final answer
    x = 10,668.60

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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.