Home / 21,158.28-29,199.42-11,727

Finding the Fourth Proportional to 21,158.28, 29,199.42 and 11,727

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Solution

The fourth proportional to 21,158.28, 29,199.42 and 11,727 is: 16,183.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.28 : 29,199.42 = 11,727 : x
  2. Step 2: Convert to fraction form
    21,158.28/29,199.42 = 11,727/x
  3. Step 3: Cross multiply
    21,158.28x = 29,199.42 × 11,727
  4. Step 4: Simplify right side
    21,158.28x = 342,421,598.34
  5. Step 5: Solve for x
    x = 342,421,598.34/21,158.28
  6. Step 6: Final answer
    x = 16,183.81

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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.