Home / 13,121.28-19,681.92-5,330.70

Finding the Fourth Proportional to 13,121.28, 19,681.92 and 5,330.70

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Solution

The fourth proportional to 13,121.28, 19,681.92 and 5,330.70 is: 7,996.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.28 : 19,681.92 = 5,330.70 : x
  2. Step 2: Convert to fraction form
    13,121.28/19,681.92 = 5,330.70/x
  3. Step 3: Cross multiply
    13,121.28x = 19,681.92 × 5,330.70
  4. Step 4: Simplify right side
    13,121.28x = 104,918,410.94
  5. Step 5: Solve for x
    x = 104,918,410.94/13,121.28
  6. Step 6: Final answer
    x = 7,996.05

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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.