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Finding the Fourth Proportional to 18,642.10, 27,943.57 and 9,141.31

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Solution

The fourth proportional to 18,642.10, 27,943.57 and 9,141.31 is: 13,702.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.10 : 27,943.57 = 9,141.31 : x
  2. Step 2: Convert to fraction form
    18,642.10/27,943.57 = 9,141.31/x
  3. Step 3: Cross multiply
    18,642.10x = 27,943.57 × 9,141.31
  4. Step 4: Simplify right side
    18,642.10x = 255,440,673.63
  5. Step 5: Solve for x
    x = 255,440,673.63/18,642.10
  6. Step 6: Final answer
    x = 13,702.36

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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.