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Finding the Fourth Proportional to 13,661.52, 18,849.42 and 8,354.40

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Solution

The fourth proportional to 13,661.52, 18,849.42 and 8,354.40 is: 11,526.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.52 : 18,849.42 = 8,354.40 : x
  2. Step 2: Convert to fraction form
    13,661.52/18,849.42 = 8,354.40/x
  3. Step 3: Cross multiply
    13,661.52x = 18,849.42 × 8,354.40
  4. Step 4: Simplify right side
    13,661.52x = 157,475,594.45
  5. Step 5: Solve for x
    x = 157,475,594.45/13,661.52
  6. Step 6: Final answer
    x = 11,526.95

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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.