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Finding the Fourth Proportional to 7,790, 10,750.18 and 4,253.21

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Solution

The fourth proportional to 7,790, 10,750.18 and 4,253.21 is: 5,869.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,790 : 10,750.18 = 4,253.21 : x
  2. Step 2: Convert to fraction form
    7,790/10,750.18 = 4,253.21/x
  3. Step 3: Cross multiply
    7,790x = 10,750.18 × 4,253.21
  4. Step 4: Simplify right side
    7,790x = 45,722,773.08
  5. Step 5: Solve for x
    x = 45,722,773.08/7,790
  6. Step 6: Final answer
    x = 5,869.42

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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.