Home / 21,156.84-29,195.28-11,724.84

Finding the Fourth Proportional to 21,156.84, 29,195.28 and 11,724.84

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Solution

The fourth proportional to 21,156.84, 29,195.28 and 11,724.84 is: 16,179.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.84 : 29,195.28 = 11,724.84 : x
  2. Step 2: Convert to fraction form
    21,156.84/29,195.28 = 11,724.84/x
  3. Step 3: Cross multiply
    21,156.84x = 29,195.28 × 11,724.84
  4. Step 4: Simplify right side
    21,156.84x = 342,309,986.76
  5. Step 5: Solve for x
    x = 342,309,986.76/21,156.84
  6. Step 6: Final answer
    x = 16,179.64

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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.