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Finding the Fourth Proportional to 7,121.64, 10,668.54 and 4,900.08

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Solution

The fourth proportional to 7,121.64, 10,668.54 and 4,900.08 is: 7,340.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.64 : 10,668.54 = 4,900.08 : x
  2. Step 2: Convert to fraction form
    7,121.64/10,668.54 = 4,900.08/x
  3. Step 3: Cross multiply
    7,121.64x = 10,668.54 × 4,900.08
  4. Step 4: Simplify right side
    7,121.64x = 52,276,699.48
  5. Step 5: Solve for x
    x = 52,276,699.48/7,121.64
  6. Step 6: Final answer
    x = 7,340.54

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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.