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Finding the Fourth Proportional to 28,616.04, 42,929.42 and 11,520.22

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Solution

The fourth proportional to 28,616.04, 42,929.42 and 11,520.22 is: 17,282.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.04 : 42,929.42 = 11,520.22 : x
  2. Step 2: Convert to fraction form
    28,616.04/42,929.42 = 11,520.22/x
  3. Step 3: Cross multiply
    28,616.04x = 42,929.42 × 11,520.22
  4. Step 4: Simplify right side
    28,616.04x = 494,556,362.87
  5. Step 5: Solve for x
    x = 494,556,362.87/28,616.04
  6. Step 6: Final answer
    x = 17,282.49

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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.