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Finding the Fourth Proportional to 18,129.34, 27,186.63 and 5,645.17

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Solution

The fourth proportional to 18,129.34, 27,186.63 and 5,645.17 is: 8,465.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.34 : 27,186.63 = 5,645.17 : x
  2. Step 2: Convert to fraction form
    18,129.34/27,186.63 = 5,645.17/x
  3. Step 3: Cross multiply
    18,129.34x = 27,186.63 × 5,645.17
  4. Step 4: Simplify right side
    18,129.34x = 153,473,148.08
  5. Step 5: Solve for x
    x = 153,473,148.08/18,129.34
  6. Step 6: Final answer
    x = 8,465.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.