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Finding the Fourth Proportional to 28,008.80, 42,008.40 and 10,469.60

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Solution

The fourth proportional to 28,008.80, 42,008.40 and 10,469.60 is: 15,702.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.80 : 42,008.40 = 10,469.60 : x
  2. Step 2: Convert to fraction form
    28,008.80/42,008.40 = 10,469.60/x
  3. Step 3: Cross multiply
    28,008.80x = 42,008.40 × 10,469.60
  4. Step 4: Simplify right side
    28,008.80x = 439,811,144.64
  5. Step 5: Solve for x
    x = 439,811,144.64/28,008.80
  6. Step 6: Final answer
    x = 15,702.61

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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.