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Finding the Fourth Proportional to 19,379.80, 29,069.70 and 5,528.80

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Solution

The fourth proportional to 19,379.80, 29,069.70 and 5,528.80 is: 8,293.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,379.80 : 29,069.70 = 5,528.80 : x
  2. Step 2: Convert to fraction form
    19,379.80/29,069.70 = 5,528.80/x
  3. Step 3: Cross multiply
    19,379.80x = 29,069.70 × 5,528.80
  4. Step 4: Simplify right side
    19,379.80x = 160,720,557.36
  5. Step 5: Solve for x
    x = 160,720,557.36/19,379.80
  6. Step 6: Final answer
    x = 8,293.20

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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.