Home / 15,902.04-21,940.38-9,939.78

Finding the Fourth Proportional to 15,902.04, 21,940.38 and 9,939.78

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Solution

The fourth proportional to 15,902.04, 21,940.38 and 9,939.78 is: 13,714.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,902.04 : 21,940.38 = 9,939.78 : x
  2. Step 2: Convert to fraction form
    15,902.04/21,940.38 = 9,939.78/x
  3. Step 3: Cross multiply
    15,902.04x = 21,940.38 × 9,939.78
  4. Step 4: Simplify right side
    15,902.04x = 218,082,550.32
  5. Step 5: Solve for x
    x = 218,082,550.32/15,902.04
  6. Step 6: Final answer
    x = 13,714.12

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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.