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Finding the Fourth Proportional to 17,979.81, 26,969.94 and 6,887.16

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Solution

The fourth proportional to 17,979.81, 26,969.94 and 6,887.16 is: 10,330.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,979.81 : 26,969.94 = 6,887.16 : x
  2. Step 2: Convert to fraction form
    17,979.81/26,969.94 = 6,887.16/x
  3. Step 3: Cross multiply
    17,979.81x = 26,969.94 × 6,887.16
  4. Step 4: Simplify right side
    17,979.81x = 185,746,393.11
  5. Step 5: Solve for x
    x = 185,746,393.11/17,979.81
  6. Step 6: Final answer
    x = 10,330.83

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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.