Home / 21,181.24-29,216.88-13,637.40

Finding the Fourth Proportional to 21,181.24, 29,216.88 and 13,637.40

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Solution

The fourth proportional to 21,181.24, 29,216.88 and 13,637.40 is: 18,811.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.24 : 29,216.88 = 13,637.40 : x
  2. Step 2: Convert to fraction form
    21,181.24/29,216.88 = 13,637.40/x
  3. Step 3: Cross multiply
    21,181.24x = 29,216.88 × 13,637.40
  4. Step 4: Simplify right side
    21,181.24x = 398,442,279.31
  5. Step 5: Solve for x
    x = 398,442,279.31/21,181.24
  6. Step 6: Final answer
    x = 18,811.09

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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.