Home / 21,228.18-29,290.01-13,169.08

Finding the Fourth Proportional to 21,228.18, 29,290.01 and 13,169.08

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Solution

The fourth proportional to 21,228.18, 29,290.01 and 13,169.08 is: 18,170.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.18 : 29,290.01 = 13,169.08 : x
  2. Step 2: Convert to fraction form
    21,228.18/29,290.01 = 13,169.08/x
  3. Step 3: Cross multiply
    21,228.18x = 29,290.01 × 13,169.08
  4. Step 4: Simplify right side
    21,228.18x = 385,722,455.66
  5. Step 5: Solve for x
    x = 385,722,455.66/21,228.18
  6. Step 6: Final answer
    x = 18,170.31

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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.