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Finding the Fourth Proportional to 21,335.53, 29,443.05 and 11,904.09

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Solution

The fourth proportional to 21,335.53, 29,443.05 and 11,904.09 is: 16,427.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.53 : 29,443.05 = 11,904.09 : x
  2. Step 2: Convert to fraction form
    21,335.53/29,443.05 = 11,904.09/x
  3. Step 3: Cross multiply
    21,335.53x = 29,443.05 × 11,904.09
  4. Step 4: Simplify right side
    21,335.53x = 350,492,717.07
  5. Step 5: Solve for x
    x = 350,492,717.07/21,335.53
  6. Step 6: Final answer
    x = 16,427.65

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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.