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Finding the Fourth Proportional to 28,468.80, 39,376.80 and 25,156.80

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Solution

The fourth proportional to 28,468.80, 39,376.80 and 25,156.80 is: 34,795.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.80 : 39,376.80 = 25,156.80 : x
  2. Step 2: Convert to fraction form
    28,468.80/39,376.80 = 25,156.80/x
  3. Step 3: Cross multiply
    28,468.80x = 39,376.80 × 25,156.80
  4. Step 4: Simplify right side
    28,468.80x = 990,594,282.24
  5. Step 5: Solve for x
    x = 990,594,282.24/28,468.80
  6. Step 6: Final answer
    x = 34,795.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.