Home / 12,887.87-19,330.59-4,120.43

Finding the Fourth Proportional to 12,887.87, 19,330.59 and 4,120.43

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Solution

The fourth proportional to 12,887.87, 19,330.59 and 4,120.43 is: 6,180.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.87 : 19,330.59 = 4,120.43 : x
  2. Step 2: Convert to fraction form
    12,887.87/19,330.59 = 4,120.43/x
  3. Step 3: Cross multiply
    12,887.87x = 19,330.59 × 4,120.43
  4. Step 4: Simplify right side
    12,887.87x = 79,650,391.28
  5. Step 5: Solve for x
    x = 79,650,391.28/12,887.87
  6. Step 6: Final answer
    x = 6,180.26

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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.