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Finding the Fourth Proportional to 28,608.40, 42,815.40 and 25,109.20

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Solution

The fourth proportional to 28,608.40, 42,815.40 and 25,109.20 is: 37,578.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,608.40 : 42,815.40 = 25,109.20 : x
  2. Step 2: Convert to fraction form
    28,608.40/42,815.40 = 25,109.20/x
  3. Step 3: Cross multiply
    28,608.40x = 42,815.40 × 25,109.20
  4. Step 4: Simplify right side
    28,608.40x = 1,075,060,441.68
  5. Step 5: Solve for x
    x = 1,075,060,441.68/28,608.40
  6. Step 6: Final answer
    x = 37,578.49

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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.