Home / 12,684.60-19,040.57-7,143.29

Finding the Fourth Proportional to 12,684.60, 19,040.57 and 7,143.29

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Solution

The fourth proportional to 12,684.60, 19,040.57 and 7,143.29 is: 10,722.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,684.60 : 19,040.57 = 7,143.29 : x
  2. Step 2: Convert to fraction form
    12,684.60/19,040.57 = 7,143.29/x
  3. Step 3: Cross multiply
    12,684.60x = 19,040.57 × 7,143.29
  4. Step 4: Simplify right side
    12,684.60x = 136,012,280.55
  5. Step 5: Solve for x
    x = 136,012,280.55/12,684.60
  6. Step 6: Final answer
    x = 10,722.63

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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.