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Finding the Fourth Proportional to 7,152.76, 10,728.76 and 1,958.60

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Solution

The fourth proportional to 7,152.76, 10,728.76 and 1,958.60 is: 2,937.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,152.76 : 10,728.76 = 1,958.60 : x
  2. Step 2: Convert to fraction form
    7,152.76/10,728.76 = 1,958.60/x
  3. Step 3: Cross multiply
    7,152.76x = 10,728.76 × 1,958.60
  4. Step 4: Simplify right side
    7,152.76x = 21,013,349.34
  5. Step 5: Solve for x
    x = 21,013,349.34/7,152.76
  6. Step 6: Final answer
    x = 2,937.80

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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.