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Finding the Fourth Proportional to 7,190.78, 9,918.86 and 5,062.55

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Solution

The fourth proportional to 7,190.78, 9,918.86 and 5,062.55 is: 6,983.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.78 : 9,918.86 = 5,062.55 : x
  2. Step 2: Convert to fraction form
    7,190.78/9,918.86 = 5,062.55/x
  3. Step 3: Cross multiply
    7,190.78x = 9,918.86 × 5,062.55
  4. Step 4: Simplify right side
    7,190.78x = 50,214,649.79
  5. Step 5: Solve for x
    x = 50,214,649.79/7,190.78
  6. Step 6: Final answer
    x = 6,983.20

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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.