Home / 15,487.39-21,374.52-9,199.79

Finding the Fourth Proportional to 15,487.39, 21,374.52 and 9,199.79

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Solution

The fourth proportional to 15,487.39, 21,374.52 and 9,199.79 is: 12,696.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.39 : 21,374.52 = 9,199.79 : x
  2. Step 2: Convert to fraction form
    15,487.39/21,374.52 = 9,199.79/x
  3. Step 3: Cross multiply
    15,487.39x = 21,374.52 × 9,199.79
  4. Step 4: Simplify right side
    15,487.39x = 196,641,049.35
  5. Step 5: Solve for x
    x = 196,641,049.35/15,487.39
  6. Step 6: Final answer
    x = 12,696.85

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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.