Home / 11,135.47-15,359.57-7,161.61

Finding the Fourth Proportional to 11,135.47, 15,359.57 and 7,161.61

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Solution

The fourth proportional to 11,135.47, 15,359.57 and 7,161.61 is: 9,878.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,135.47 : 15,359.57 = 7,161.61 : x
  2. Step 2: Convert to fraction form
    11,135.47/15,359.57 = 7,161.61/x
  3. Step 3: Cross multiply
    11,135.47x = 15,359.57 × 7,161.61
  4. Step 4: Simplify right side
    11,135.47x = 109,999,214.30
  5. Step 5: Solve for x
    x = 109,999,214.30/11,135.47
  6. Step 6: Final answer
    x = 9,878.27

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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.