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Finding the Fourth Proportional to 15,987.93, 22,059.99 and 8,914.20

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Solution

The fourth proportional to 15,987.93, 22,059.99 and 8,914.20 is: 12,299.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,987.93 : 22,059.99 = 8,914.20 : x
  2. Step 2: Convert to fraction form
    15,987.93/22,059.99 = 8,914.20/x
  3. Step 3: Cross multiply
    15,987.93x = 22,059.99 × 8,914.20
  4. Step 4: Simplify right side
    15,987.93x = 196,647,162.86
  5. Step 5: Solve for x
    x = 196,647,162.86/15,987.93
  6. Step 6: Final answer
    x = 12,299.73

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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.