Home / 21,491.84-29,659.68-13,531.04

Finding the Fourth Proportional to 21,491.84, 29,659.68 and 13,531.04

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Solution

The fourth proportional to 21,491.84, 29,659.68 and 13,531.04 is: 18,673.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,491.84 : 29,659.68 = 13,531.04 : x
  2. Step 2: Convert to fraction form
    21,491.84/29,659.68 = 13,531.04/x
  3. Step 3: Cross multiply
    21,491.84x = 29,659.68 × 13,531.04
  4. Step 4: Simplify right side
    21,491.84x = 401,326,316.47
  5. Step 5: Solve for x
    x = 401,326,316.47/21,491.84
  6. Step 6: Final answer
    x = 18,673.43

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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.