Home / 19,911.15-29,867.81-5,120.19

Finding the Fourth Proportional to 19,911.15, 29,867.81 and 5,120.19

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Solution

The fourth proportional to 19,911.15, 29,867.81 and 5,120.19 is: 7,680.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.15 : 29,867.81 = 5,120.19 : x
  2. Step 2: Convert to fraction form
    19,911.15/29,867.81 = 5,120.19/x
  3. Step 3: Cross multiply
    19,911.15x = 29,867.81 × 5,120.19
  4. Step 4: Simplify right side
    19,911.15x = 152,928,836.48
  5. Step 5: Solve for x
    x = 152,928,836.48/19,911.15
  6. Step 6: Final answer
    x = 7,680.56

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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.