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Finding the Fourth Proportional to 28,348.80, 42,523.20 and 7,288.80

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Solution

The fourth proportional to 28,348.80, 42,523.20 and 7,288.80 is: 10,933.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,348.80 : 42,523.20 = 7,288.80 : x
  2. Step 2: Convert to fraction form
    28,348.80/42,523.20 = 7,288.80/x
  3. Step 3: Cross multiply
    28,348.80x = 42,523.20 × 7,288.80
  4. Step 4: Simplify right side
    28,348.80x = 309,943,100.16
  5. Step 5: Solve for x
    x = 309,943,100.16/28,348.80
  6. Step 6: Final answer
    x = 10,933.20

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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.