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Finding the Fourth Proportional to 16,991.86, 25,476.16 and 8,655.74

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Solution

The fourth proportional to 16,991.86, 25,476.16 and 8,655.74 is: 12,977.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.86 : 25,476.16 = 8,655.74 : x
  2. Step 2: Convert to fraction form
    16,991.86/25,476.16 = 8,655.74/x
  3. Step 3: Cross multiply
    16,991.86x = 25,476.16 × 8,655.74
  4. Step 4: Simplify right side
    16,991.86x = 220,515,017.16
  5. Step 5: Solve for x
    x = 220,515,017.16/16,991.86
  6. Step 6: Final answer
    x = 12,977.69

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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.