Home / 21,167.81-29,187.62-13,500.85

Finding the Fourth Proportional to 21,167.81, 29,187.62 and 13,500.85

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Solution

The fourth proportional to 21,167.81, 29,187.62 and 13,500.85 is: 18,615.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.81 : 29,187.62 = 13,500.85 : x
  2. Step 2: Convert to fraction form
    21,167.81/29,187.62 = 13,500.85/x
  3. Step 3: Cross multiply
    21,167.81x = 29,187.62 × 13,500.85
  4. Step 4: Simplify right side
    21,167.81x = 394,057,466.03
  5. Step 5: Solve for x
    x = 394,057,466.03/21,167.81
  6. Step 6: Final answer
    x = 18,615.88

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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.