Home / 12,479.90-17,222.10-6,815.17

Finding the Fourth Proportional to 12,479.90, 17,222.10 and 6,815.17

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Solution

The fourth proportional to 12,479.90, 17,222.10 and 6,815.17 is: 9,404.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.90 : 17,222.10 = 6,815.17 : x
  2. Step 2: Convert to fraction form
    12,479.90/17,222.10 = 6,815.17/x
  3. Step 3: Cross multiply
    12,479.90x = 17,222.10 × 6,815.17
  4. Step 4: Simplify right side
    12,479.90x = 117,371,453.15
  5. Step 5: Solve for x
    x = 117,371,453.15/12,479.90
  6. Step 6: Final answer
    x = 9,404.84

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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.