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Finding the Fourth Proportional to 28,543.72, 42,799.86 and 8,816.80

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Solution

The fourth proportional to 28,543.72, 42,799.86 and 8,816.80 is: 13,220.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,543.72 : 42,799.86 = 8,816.80 : x
  2. Step 2: Convert to fraction form
    28,543.72/42,799.86 = 8,816.80/x
  3. Step 3: Cross multiply
    28,543.72x = 42,799.86 × 8,816.80
  4. Step 4: Simplify right side
    28,543.72x = 377,357,805.65
  5. Step 5: Solve for x
    x = 377,357,805.65/28,543.72
  6. Step 6: Final answer
    x = 13,220.34

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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.