Home / 21,157.68-29,210.85-13,617.09

Finding the Fourth Proportional to 21,157.68, 29,210.85 and 13,617.09

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Solution

The fourth proportional to 21,157.68, 29,210.85 and 13,617.09 is: 18,800.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.68 : 29,210.85 = 13,617.09 : x
  2. Step 2: Convert to fraction form
    21,157.68/29,210.85 = 13,617.09/x
  3. Step 3: Cross multiply
    21,157.68x = 29,210.85 × 13,617.09
  4. Step 4: Simplify right side
    21,157.68x = 397,766,773.43
  5. Step 5: Solve for x
    x = 397,766,773.43/21,157.68
  6. Step 6: Final answer
    x = 18,800.11

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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.