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Finding the Fourth Proportional to 21,068.70, 29,076.33 and 12,119.01

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Solution

The fourth proportional to 21,068.70, 29,076.33 and 12,119.01 is: 16,725.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,068.70 : 29,076.33 = 12,119.01 : x
  2. Step 2: Convert to fraction form
    21,068.70/29,076.33 = 12,119.01/x
  3. Step 3: Cross multiply
    21,068.70x = 29,076.33 × 12,119.01
  4. Step 4: Simplify right side
    21,068.70x = 352,376,334.03
  5. Step 5: Solve for x
    x = 352,376,334.03/21,068.70
  6. Step 6: Final answer
    x = 16,725.11

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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.