Home / 21,681.45-29,923.83-13,186.26

Finding the Fourth Proportional to 21,681.45, 29,923.83 and 13,186.26

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Solution

The fourth proportional to 21,681.45, 29,923.83 and 13,186.26 is: 18,199.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.45 : 29,923.83 = 13,186.26 : x
  2. Step 2: Convert to fraction form
    21,681.45/29,923.83 = 13,186.26/x
  3. Step 3: Cross multiply
    21,681.45x = 29,923.83 × 13,186.26
  4. Step 4: Simplify right side
    21,681.45x = 394,583,402.58
  5. Step 5: Solve for x
    x = 394,583,402.58/21,681.45
  6. Step 6: Final answer
    x = 18,199.12

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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.