Home / 21,170.46-29,220.99-13,207.89

Finding the Fourth Proportional to 21,170.46, 29,220.99 and 13,207.89

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Solution

The fourth proportional to 21,170.46, 29,220.99 and 13,207.89 is: 18,230.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.46 : 29,220.99 = 13,207.89 : x
  2. Step 2: Convert to fraction form
    21,170.46/29,220.99 = 13,207.89/x
  3. Step 3: Cross multiply
    21,170.46x = 29,220.99 × 13,207.89
  4. Step 4: Simplify right side
    21,170.46x = 385,947,621.61
  5. Step 5: Solve for x
    x = 385,947,621.61/21,170.46
  6. Step 6: Final answer
    x = 18,230.48

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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.