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Finding the Fourth Proportional to 7,812.90, 10,793.52 and 5,130.45

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Solution

The fourth proportional to 7,812.90, 10,793.52 and 5,130.45 is: 7,087.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,812.90 : 10,793.52 = 5,130.45 : x
  2. Step 2: Convert to fraction form
    7,812.90/10,793.52 = 5,130.45/x
  3. Step 3: Cross multiply
    7,812.90x = 10,793.52 × 5,130.45
  4. Step 4: Simplify right side
    7,812.90x = 55,375,614.68
  5. Step 5: Solve for x
    x = 55,375,614.68/7,812.90
  6. Step 6: Final answer
    x = 7,087.72

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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.