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Finding the Fourth Proportional to 17,955.66, 26,916.86 and 9,171.20

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Solution

The fourth proportional to 17,955.66, 26,916.86 and 9,171.20 is: 13,748.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,955.66 : 26,916.86 = 9,171.20 : x
  2. Step 2: Convert to fraction form
    17,955.66/26,916.86 = 9,171.20/x
  3. Step 3: Cross multiply
    17,955.66x = 26,916.86 × 9,171.20
  4. Step 4: Simplify right side
    17,955.66x = 246,859,906.43
  5. Step 5: Solve for x
    x = 246,859,906.43/17,955.66
  6. Step 6: Final answer
    x = 13,748.31

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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.