Home / 21,157.50-29,185.76-13,486.53

Finding the Fourth Proportional to 21,157.50, 29,185.76 and 13,486.53

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Solution

The fourth proportional to 21,157.50, 29,185.76 and 13,486.53 is: 18,604.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.50 : 29,185.76 = 13,486.53 : x
  2. Step 2: Convert to fraction form
    21,157.50/29,185.76 = 13,486.53/x
  3. Step 3: Cross multiply
    21,157.50x = 29,185.76 × 13,486.53
  4. Step 4: Simplify right side
    21,157.50x = 393,614,770.98
  5. Step 5: Solve for x
    x = 393,614,770.98/21,157.50
  6. Step 6: Final answer
    x = 18,604.03

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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.