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Finding the Fourth Proportional to 13,658.52, 18,809.10 and 11,865.18

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Solution

The fourth proportional to 13,658.52, 18,809.10 and 11,865.18 is: 16,339.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,658.52 : 18,809.10 = 11,865.18 : x
  2. Step 2: Convert to fraction form
    13,658.52/18,809.10 = 11,865.18/x
  3. Step 3: Cross multiply
    13,658.52x = 18,809.10 × 11,865.18
  4. Step 4: Simplify right side
    13,658.52x = 223,173,357.14
  5. Step 5: Solve for x
    x = 223,173,357.14/13,658.52
  6. Step 6: Final answer
    x = 16,339.50

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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.