Home / 21,617.80-29,839.96-12,668.16

Finding the Fourth Proportional to 21,617.80, 29,839.96 and 12,668.16

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Solution

The fourth proportional to 21,617.80, 29,839.96 and 12,668.16 is: 17,486.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.80 : 29,839.96 = 12,668.16 : x
  2. Step 2: Convert to fraction form
    21,617.80/29,839.96 = 12,668.16/x
  3. Step 3: Cross multiply
    21,617.80x = 29,839.96 × 12,668.16
  4. Step 4: Simplify right side
    21,617.80x = 378,017,387.67
  5. Step 5: Solve for x
    x = 378,017,387.67/21,617.80
  6. Step 6: Final answer
    x = 17,486.39

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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.