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Finding the Fourth Proportional to 13,101.39, 18,079.38 and 7,133.13

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Solution

The fourth proportional to 13,101.39, 18,079.38 and 7,133.13 is: 9,843.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.39 : 18,079.38 = 7,133.13 : x
  2. Step 2: Convert to fraction form
    13,101.39/18,079.38 = 7,133.13/x
  3. Step 3: Cross multiply
    13,101.39x = 18,079.38 × 7,133.13
  4. Step 4: Simplify right side
    13,101.39x = 128,962,567.86
  5. Step 5: Solve for x
    x = 128,962,567.86/13,101.39
  6. Step 6: Final answer
    x = 9,843.43

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Half scale
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Double scale
Find fourth proportional to 13,102.39, 18,080.76 and 7,134.13
Similar ratio
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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.