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Finding the Fourth Proportional to 28,448.80, 42,637.20 and 10,895.20

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Solution

The fourth proportional to 28,448.80, 42,637.20 and 10,895.20 is: 16,329.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.80 : 42,637.20 = 10,895.20 : x
  2. Step 2: Convert to fraction form
    28,448.80/42,637.20 = 10,895.20/x
  3. Step 3: Cross multiply
    28,448.80x = 42,637.20 × 10,895.20
  4. Step 4: Simplify right side
    28,448.80x = 464,540,821.44
  5. Step 5: Solve for x
    x = 464,540,821.44/28,448.80
  6. Step 6: Final answer
    x = 16,329.01

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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.