Home / 13,179.76-19,772.32-5,389.20

Finding the Fourth Proportional to 13,179.76, 19,772.32 and 5,389.20

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Solution

The fourth proportional to 13,179.76, 19,772.32 and 5,389.20 is: 8,084.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.76 : 19,772.32 = 5,389.20 : x
  2. Step 2: Convert to fraction form
    13,179.76/19,772.32 = 5,389.20/x
  3. Step 3: Cross multiply
    13,179.76x = 19,772.32 × 5,389.20
  4. Step 4: Simplify right side
    13,179.76x = 106,556,986.94
  5. Step 5: Solve for x
    x = 106,556,986.94/13,179.76
  6. Step 6: Final answer
    x = 8,084.90

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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.