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Finding the Fourth Proportional to 15,987.49, 22,062.49 and 8,913.73

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Solution

The fourth proportional to 15,987.49, 22,062.49 and 8,913.73 is: 12,300.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,987.49 : 22,062.49 = 8,913.73 : x
  2. Step 2: Convert to fraction form
    15,987.49/22,062.49 = 8,913.73/x
  3. Step 3: Cross multiply
    15,987.49x = 22,062.49 × 8,913.73
  4. Step 4: Simplify right side
    15,987.49x = 196,659,078.99
  5. Step 5: Solve for x
    x = 196,659,078.99/15,987.49
  6. Step 6: Final answer
    x = 12,300.81

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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.