Home / 13,278.19-19,917.83-3,918.20

Finding the Fourth Proportional to 13,278.19, 19,917.83 and 3,918.20

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Solution

The fourth proportional to 13,278.19, 19,917.83 and 3,918.20 is: 5,877.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.19 : 19,917.83 = 3,918.20 : x
  2. Step 2: Convert to fraction form
    13,278.19/19,917.83 = 3,918.20/x
  3. Step 3: Cross multiply
    13,278.19x = 19,917.83 × 3,918.20
  4. Step 4: Simplify right side
    13,278.19x = 78,042,106.40
  5. Step 5: Solve for x
    x = 78,042,106.40/13,278.19
  6. Step 6: Final answer
    x = 5,877.47

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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.