Home / 13,169.52-18,168.84-8,456.40

Finding the Fourth Proportional to 13,169.52, 18,168.84 and 8,456.40

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Solution

The fourth proportional to 13,169.52, 18,168.84 and 8,456.40 is: 11,666.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,169.52 : 18,168.84 = 8,456.40 : x
  2. Step 2: Convert to fraction form
    13,169.52/18,168.84 = 8,456.40/x
  3. Step 3: Cross multiply
    13,169.52x = 18,168.84 × 8,456.40
  4. Step 4: Simplify right side
    13,169.52x = 153,642,978.58
  5. Step 5: Solve for x
    x = 153,642,978.58/13,169.52
  6. Step 6: Final answer
    x = 11,666.56

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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.