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Finding the Fourth Proportional to 13,101.48, 18,079.74 and 7,133.13

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Solution

The fourth proportional to 13,101.48, 18,079.74 and 7,133.13 is: 9,843.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.48 : 18,079.74 = 7,133.13 : x
  2. Step 2: Convert to fraction form
    13,101.48/18,079.74 = 7,133.13/x
  3. Step 3: Cross multiply
    13,101.48x = 18,079.74 × 7,133.13
  4. Step 4: Simplify right side
    13,101.48x = 128,965,135.79
  5. Step 5: Solve for x
    x = 128,965,135.79/13,101.48
  6. Step 6: Final answer
    x = 9,843.55

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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.