Home / 21,127.68-29,157.84-11,697.12

Finding the Fourth Proportional to 21,127.68, 29,157.84 and 11,697.12

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Solution

The fourth proportional to 21,127.68, 29,157.84 and 11,697.12 is: 16,142.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.68 : 29,157.84 = 11,697.12 : x
  2. Step 2: Convert to fraction form
    21,127.68/29,157.84 = 11,697.12/x
  3. Step 3: Cross multiply
    21,127.68x = 29,157.84 × 11,697.12
  4. Step 4: Simplify right side
    21,127.68x = 341,062,753.42
  5. Step 5: Solve for x
    x = 341,062,753.42/21,127.68
  6. Step 6: Final answer
    x = 16,142.93

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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.