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Finding the Fourth Proportional to 16,987.86, 25,470.16 and 8,651.74

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Solution

The fourth proportional to 16,987.86, 25,470.16 and 8,651.74 is: 12,971.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,987.86 : 25,470.16 = 8,651.74 : x
  2. Step 2: Convert to fraction form
    16,987.86/25,470.16 = 8,651.74/x
  3. Step 3: Cross multiply
    16,987.86x = 25,470.16 × 8,651.74
  4. Step 4: Simplify right side
    16,987.86x = 220,361,202.08
  5. Step 5: Solve for x
    x = 220,361,202.08/16,987.86
  6. Step 6: Final answer
    x = 12,971.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.