Home / 15,899.04-21,936.24-9,936.78

Finding the Fourth Proportional to 15,899.04, 21,936.24 and 9,936.78

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Solution

The fourth proportional to 15,899.04, 21,936.24 and 9,936.78 is: 13,709.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,899.04 : 21,936.24 = 9,936.78 : x
  2. Step 2: Convert to fraction form
    15,899.04/21,936.24 = 9,936.78/x
  3. Step 3: Cross multiply
    15,899.04x = 21,936.24 × 9,936.78
  4. Step 4: Simplify right side
    15,899.04x = 217,975,590.91
  5. Step 5: Solve for x
    x = 217,975,590.91/15,899.04
  6. Step 6: Final answer
    x = 13,709.98

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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.