Home / 21,165.10-29,194.62-13,621.30

Finding the Fourth Proportional to 21,165.10, 29,194.62 and 13,621.30

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Solution

The fourth proportional to 21,165.10, 29,194.62 and 13,621.30 is: 18,788.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.10 : 29,194.62 = 13,621.30 : x
  2. Step 2: Convert to fraction form
    21,165.10/29,194.62 = 13,621.30/x
  3. Step 3: Cross multiply
    21,165.10x = 29,194.62 × 13,621.30
  4. Step 4: Simplify right side
    21,165.10x = 397,668,677.41
  5. Step 5: Solve for x
    x = 397,668,677.41/21,165.10
  6. Step 6: Final answer
    x = 18,788.89

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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.