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Finding the Fourth Proportional to 21,787.19, 30,066.32 and 11,851.19

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Solution

The fourth proportional to 21,787.19, 30,066.32 and 11,851.19 is: 16,354.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.19 : 30,066.32 = 11,851.19 : x
  2. Step 2: Convert to fraction form
    21,787.19/30,066.32 = 11,851.19/x
  3. Step 3: Cross multiply
    21,787.19x = 30,066.32 × 11,851.19
  4. Step 4: Simplify right side
    21,787.19x = 356,321,670.92
  5. Step 5: Solve for x
    x = 356,321,670.92/21,787.19
  6. Step 6: Final answer
    x = 16,354.64

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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.