Home / 10,161.28-15,238.80-3,920.80

Finding the Fourth Proportional to 10,161.28, 15,238.80 and 3,920.80

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Solution

The fourth proportional to 10,161.28, 15,238.80 and 3,920.80 is: 5,880.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,161.28 : 15,238.80 = 3,920.80 : x
  2. Step 2: Convert to fraction form
    10,161.28/15,238.80 = 3,920.80/x
  3. Step 3: Cross multiply
    10,161.28x = 15,238.80 × 3,920.80
  4. Step 4: Simplify right side
    10,161.28x = 59,748,287.04
  5. Step 5: Solve for x
    x = 59,748,287.04/10,161.28
  6. Step 6: Final answer
    x = 5,880.00

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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.