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Finding the Fourth Proportional to 62,515.20, 86,277.84 and 39,855

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Solution

The fourth proportional to 62,515.20, 86,277.84 and 39,855 is: 55,004.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,515.20 : 86,277.84 = 39,855 : x
  2. Step 2: Convert to fraction form
    62,515.20/86,277.84 = 39,855/x
  3. Step 3: Cross multiply
    62,515.20x = 86,277.84 × 39,855
  4. Step 4: Simplify right side
    62,515.20x = 3,438,603,313.20
  5. Step 5: Solve for x
    x = 3,438,603,313.20/62,515.20
  6. Step 6: Final answer
    x = 55,004.28

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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.