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Finding the Fourth Proportional to 12,991.22, 17,926.54 and 9,590.04

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Solution

The fourth proportional to 12,991.22, 17,926.54 and 9,590.04 is: 13,233.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.22 : 17,926.54 = 9,590.04 : x
  2. Step 2: Convert to fraction form
    12,991.22/17,926.54 = 9,590.04/x
  3. Step 3: Cross multiply
    12,991.22x = 17,926.54 × 9,590.04
  4. Step 4: Simplify right side
    12,991.22x = 171,916,247.65
  5. Step 5: Solve for x
    x = 171,916,247.65/12,991.22
  6. Step 6: Final answer
    x = 13,233.27

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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.