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Finding the Fourth Proportional to 7,252.90, 10,879.36 and 1,987.52

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Solution

The fourth proportional to 7,252.90, 10,879.36 and 1,987.52 is: 2,981.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,252.90 : 10,879.36 = 1,987.52 : x
  2. Step 2: Convert to fraction form
    7,252.90/10,879.36 = 1,987.52/x
  3. Step 3: Cross multiply
    7,252.90x = 10,879.36 × 1,987.52
  4. Step 4: Simplify right side
    7,252.90x = 21,622,945.59
  5. Step 5: Solve for x
    x = 21,622,945.59/7,252.90
  6. Step 6: Final answer
    x = 2,981.28

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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.