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Finding the Fourth Proportional to 28,100.80, 42,153.60 and 8,378.08

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Solution

The fourth proportional to 28,100.80, 42,153.60 and 8,378.08 is: 12,567.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,100.80 : 42,153.60 = 8,378.08 : x
  2. Step 2: Convert to fraction form
    28,100.80/42,153.60 = 8,378.08/x
  3. Step 3: Cross multiply
    28,100.80x = 42,153.60 × 8,378.08
  4. Step 4: Simplify right side
    28,100.80x = 353,166,233.09
  5. Step 5: Solve for x
    x = 353,166,233.09/28,100.80
  6. Step 6: Final answer
    x = 12,567.84

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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.