Home / 12,515.45-18,778.64-4,722.44

Finding the Fourth Proportional to 12,515.45, 18,778.64 and 4,722.44

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Solution

The fourth proportional to 12,515.45, 18,778.64 and 4,722.44 is: 7,085.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.45 : 18,778.64 = 4,722.44 : x
  2. Step 2: Convert to fraction form
    12,515.45/18,778.64 = 4,722.44/x
  3. Step 3: Cross multiply
    12,515.45x = 18,778.64 × 4,722.44
  4. Step 4: Simplify right side
    12,515.45x = 88,680,883.18
  5. Step 5: Solve for x
    x = 88,680,883.18/12,515.45
  6. Step 6: Final answer
    x = 7,085.72

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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.