Home / 11,115.30-15,334.74-7,135.80

Finding the Fourth Proportional to 11,115.30, 15,334.74 and 7,135.80

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Solution

The fourth proportional to 11,115.30, 15,334.74 and 7,135.80 is: 9,844.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.30 : 15,334.74 = 7,135.80 : x
  2. Step 2: Convert to fraction form
    11,115.30/15,334.74 = 7,135.80/x
  3. Step 3: Cross multiply
    11,115.30x = 15,334.74 × 7,135.80
  4. Step 4: Simplify right side
    11,115.30x = 109,425,637.69
  5. Step 5: Solve for x
    x = 109,425,637.69/11,115.30
  6. Step 6: Final answer
    x = 9,844.60

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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.