Home / 21,126.42-29,153.12-11,694.38

Finding the Fourth Proportional to 21,126.42, 29,153.12 and 11,694.38

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Solution

The fourth proportional to 21,126.42, 29,153.12 and 11,694.38 is: 16,137.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.42 : 29,153.12 = 11,694.38 : x
  2. Step 2: Convert to fraction form
    21,126.42/29,153.12 = 11,694.38/x
  3. Step 3: Cross multiply
    21,126.42x = 29,153.12 × 11,694.38
  4. Step 4: Simplify right side
    21,126.42x = 340,927,459.23
  5. Step 5: Solve for x
    x = 340,927,459.23/21,126.42
  6. Step 6: Final answer
    x = 16,137.49

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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.