Home / 13,089.28-19,628.40-5,190.56

Finding the Fourth Proportional to 13,089.28, 19,628.40 and 5,190.56

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Solution

The fourth proportional to 13,089.28, 19,628.40 and 5,190.56 is: 7,783.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.28 : 19,628.40 = 5,190.56 : x
  2. Step 2: Convert to fraction form
    13,089.28/19,628.40 = 5,190.56/x
  3. Step 3: Cross multiply
    13,089.28x = 19,628.40 × 5,190.56
  4. Step 4: Simplify right side
    13,089.28x = 101,882,387.90
  5. Step 5: Solve for x
    x = 101,882,387.90/13,089.28
  6. Step 6: Final answer
    x = 7,783.65

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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.