Home / 28,388.12-39,172.62-16,455.20

Finding the Fourth Proportional to 28,388.12, 39,172.62 and 16,455.20

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Solution

The fourth proportional to 28,388.12, 39,172.62 and 16,455.20 is: 22,706.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.12 : 39,172.62 = 16,455.20 : x
  2. Step 2: Convert to fraction form
    28,388.12/39,172.62 = 16,455.20/x
  3. Step 3: Cross multiply
    28,388.12x = 39,172.62 × 16,455.20
  4. Step 4: Simplify right side
    28,388.12x = 644,593,296.62
  5. Step 5: Solve for x
    x = 644,593,296.62/28,388.12
  6. Step 6: Final answer
    x = 22,706.45

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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.