Home / 13,121.36-19,680.84-4,357.28

Finding the Fourth Proportional to 13,121.36, 19,680.84 and 4,357.28

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Solution

The fourth proportional to 13,121.36, 19,680.84 and 4,357.28 is: 6,535.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.36 : 19,680.84 = 4,357.28 : x
  2. Step 2: Convert to fraction form
    13,121.36/19,680.84 = 4,357.28/x
  3. Step 3: Cross multiply
    13,121.36x = 19,680.84 × 4,357.28
  4. Step 4: Simplify right side
    13,121.36x = 85,754,930.52
  5. Step 5: Solve for x
    x = 85,754,930.52/13,121.36
  6. Step 6: Final answer
    x = 6,535.52

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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.