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Finding the Fourth Proportional to 5,112.49, 7,655.06 and 2,918.20

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Solution

The fourth proportional to 5,112.49, 7,655.06 and 2,918.20 is: 4,369.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,112.49 : 7,655.06 = 2,918.20 : x
  2. Step 2: Convert to fraction form
    5,112.49/7,655.06 = 2,918.20/x
  3. Step 3: Cross multiply
    5,112.49x = 7,655.06 × 2,918.20
  4. Step 4: Simplify right side
    5,112.49x = 22,338,984.25
  5. Step 5: Solve for x
    x = 22,338,984.25/5,112.49
  6. Step 6: Final answer
    x = 4,369.49

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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.