Home / 21,157.70-29,199.74-11,728.08

Finding the Fourth Proportional to 21,157.70, 29,199.74 and 11,728.08

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Solution

The fourth proportional to 21,157.70, 29,199.74 and 11,728.08 is: 16,185.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.70 : 29,199.74 = 11,728.08 : x
  2. Step 2: Convert to fraction form
    21,157.70/29,199.74 = 11,728.08/x
  3. Step 3: Cross multiply
    21,157.70x = 29,199.74 × 11,728.08
  4. Step 4: Simplify right side
    21,157.70x = 342,456,828.06
  5. Step 5: Solve for x
    x = 342,456,828.06/21,157.70
  6. Step 6: Final answer
    x = 16,185.92

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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.