Home / 21,354.84-29,468.61-11,921.58

Finding the Fourth Proportional to 21,354.84, 29,468.61 and 11,921.58

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Solution

The fourth proportional to 21,354.84, 29,468.61 and 11,921.58 is: 16,451.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,354.84 : 29,468.61 = 11,921.58 : x
  2. Step 2: Convert to fraction form
    21,354.84/29,468.61 = 11,921.58/x
  3. Step 3: Cross multiply
    21,354.84x = 29,468.61 × 11,921.58
  4. Step 4: Simplify right side
    21,354.84x = 351,312,391.60
  5. Step 5: Solve for x
    x = 351,312,391.60/21,354.84
  6. Step 6: Final answer
    x = 16,451.18

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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.