Home / 19,179.80-28,769.70-5,328.80

Finding the Fourth Proportional to 19,179.80, 28,769.70 and 5,328.80

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Solution

The fourth proportional to 19,179.80, 28,769.70 and 5,328.80 is: 7,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,179.80 : 28,769.70 = 5,328.80 : x
  2. Step 2: Convert to fraction form
    19,179.80/28,769.70 = 5,328.80/x
  3. Step 3: Cross multiply
    19,179.80x = 28,769.70 × 5,328.80
  4. Step 4: Simplify right side
    19,179.80x = 153,307,977.36
  5. Step 5: Solve for x
    x = 153,307,977.36/19,179.80
  6. Step 6: Final answer
    x = 7,993.20

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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.