Home / 8,215.48-11,351.82-7,165.72

Finding the Fourth Proportional to 8,215.48, 11,351.82 and 7,165.72

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Solution

The fourth proportional to 8,215.48, 11,351.82 and 7,165.72 is: 9,901.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.48 : 11,351.82 = 7,165.72 : x
  2. Step 2: Convert to fraction form
    8,215.48/11,351.82 = 7,165.72/x
  3. Step 3: Cross multiply
    8,215.48x = 11,351.82 × 7,165.72
  4. Step 4: Simplify right side
    8,215.48x = 81,343,963.61
  5. Step 5: Solve for x
    x = 81,343,963.61/8,215.48
  6. Step 6: Final answer
    x = 9,901.30

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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.