Home / 21,306.07-29,365.63-15,991.66

Finding the Fourth Proportional to 21,306.07, 29,365.63 and 15,991.66

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Solution

The fourth proportional to 21,306.07, 29,365.63 and 15,991.66 is: 22,040.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.07 : 29,365.63 = 15,991.66 : x
  2. Step 2: Convert to fraction form
    21,306.07/29,365.63 = 15,991.66/x
  3. Step 3: Cross multiply
    21,306.07x = 29,365.63 × 15,991.66
  4. Step 4: Simplify right side
    21,306.07x = 469,605,170.65
  5. Step 5: Solve for x
    x = 469,605,170.65/21,306.07
  6. Step 6: Final answer
    x = 22,040.91

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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.