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Finding the Fourth Proportional to 7,515.78, 10,371.72 and 4,203.78

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Solution

The fourth proportional to 7,515.78, 10,371.72 and 4,203.78 is: 5,801.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,515.78 : 10,371.72 = 4,203.78 : x
  2. Step 2: Convert to fraction form
    7,515.78/10,371.72 = 4,203.78/x
  3. Step 3: Cross multiply
    7,515.78x = 10,371.72 × 4,203.78
  4. Step 4: Simplify right side
    7,515.78x = 43,600,429.10
  5. Step 5: Solve for x
    x = 43,600,429.10/7,515.78
  6. Step 6: Final answer
    x = 5,801.18

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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.