Home / 18,805.04-28,204.32-7,115.12

Finding the Fourth Proportional to 18,805.04, 28,204.32 and 7,115.12

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Solution

The fourth proportional to 18,805.04, 28,204.32 and 7,115.12 is: 10,671.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.04 : 28,204.32 = 7,115.12 : x
  2. Step 2: Convert to fraction form
    18,805.04/28,204.32 = 7,115.12/x
  3. Step 3: Cross multiply
    18,805.04x = 28,204.32 × 7,115.12
  4. Step 4: Simplify right side
    18,805.04x = 200,677,121.32
  5. Step 5: Solve for x
    x = 200,677,121.32/18,805.04
  6. Step 6: Final answer
    x = 10,671.45

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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.