Home / 21,221.29-29,305.07-13,685.25

Finding the Fourth Proportional to 21,221.29, 29,305.07 and 13,685.25

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Solution

The fourth proportional to 21,221.29, 29,305.07 and 13,685.25 is: 18,898.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.29 : 29,305.07 = 13,685.25 : x
  2. Step 2: Convert to fraction form
    21,221.29/29,305.07 = 13,685.25/x
  3. Step 3: Cross multiply
    21,221.29x = 29,305.07 × 13,685.25
  4. Step 4: Simplify right side
    21,221.29x = 401,047,209.22
  5. Step 5: Solve for x
    x = 401,047,209.22/21,221.29
  6. Step 6: Final answer
    x = 18,898.34

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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.