Home / 21,118.10-29,116.52-13,551.08

Finding the Fourth Proportional to 21,118.10, 29,116.52 and 13,551.08

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Solution

The fourth proportional to 21,118.10, 29,116.52 and 13,551.08 is: 18,683.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.10 : 29,116.52 = 13,551.08 : x
  2. Step 2: Convert to fraction form
    21,118.10/29,116.52 = 13,551.08/x
  3. Step 3: Cross multiply
    21,118.10x = 29,116.52 × 13,551.08
  4. Step 4: Simplify right side
    21,118.10x = 394,560,296.88
  5. Step 5: Solve for x
    x = 394,560,296.88/21,118.10
  6. Step 6: Final answer
    x = 18,683.51

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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.