Home / 21,637.67-29,861.46-13,679.42

Finding the Fourth Proportional to 21,637.67, 29,861.46 and 13,679.42

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Solution

The fourth proportional to 21,637.67, 29,861.46 and 13,679.42 is: 18,878.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,637.67 : 29,861.46 = 13,679.42 : x
  2. Step 2: Convert to fraction form
    21,637.67/29,861.46 = 13,679.42/x
  3. Step 3: Cross multiply
    21,637.67x = 29,861.46 × 13,679.42
  4. Step 4: Simplify right side
    21,637.67x = 408,487,303.85
  5. Step 5: Solve for x
    x = 408,487,303.85/21,637.67
  6. Step 6: Final answer
    x = 18,878.53

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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.