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Finding the Fourth Proportional to 21,294.30, 31,940.04 and 8,811.06

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Solution

The fourth proportional to 21,294.30, 31,940.04 and 8,811.06 is: 13,216.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,294.30 : 31,940.04 = 8,811.06 : x
  2. Step 2: Convert to fraction form
    21,294.30/31,940.04 = 8,811.06/x
  3. Step 3: Cross multiply
    21,294.30x = 31,940.04 × 8,811.06
  4. Step 4: Simplify right side
    21,294.30x = 281,425,608.84
  5. Step 5: Solve for x
    x = 281,425,608.84/21,294.30
  6. Step 6: Final answer
    x = 13,216.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.