Home / 12,515.81-18,778.95-5,492.21

Finding the Fourth Proportional to 12,515.81, 18,778.95 and 5,492.21

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Solution

The fourth proportional to 12,515.81, 18,778.95 and 5,492.21 is: 8,240.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.81 : 18,778.95 = 5,492.21 : x
  2. Step 2: Convert to fraction form
    12,515.81/18,778.95 = 5,492.21/x
  3. Step 3: Cross multiply
    12,515.81x = 18,778.95 × 5,492.21
  4. Step 4: Simplify right side
    12,515.81x = 103,137,843.08
  5. Step 5: Solve for x
    x = 103,137,843.08/12,515.81
  6. Step 6: Final answer
    x = 8,240.61

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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.