Home / 12,311.25-16,989.55-6,722.25

Finding the Fourth Proportional to 12,311.25, 16,989.55 and 6,722.25

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Solution

The fourth proportional to 12,311.25, 16,989.55 and 6,722.25 is: 9,276.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,311.25 : 16,989.55 = 6,722.25 : x
  2. Step 2: Convert to fraction form
    12,311.25/16,989.55 = 6,722.25/x
  3. Step 3: Cross multiply
    12,311.25x = 16,989.55 × 6,722.25
  4. Step 4: Simplify right side
    12,311.25x = 114,207,985.68
  5. Step 5: Solve for x
    x = 114,207,985.68/12,311.25
  6. Step 6: Final answer
    x = 9,276.72

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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.