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Finding the Fourth Proportional to 21,705.39, 32,559.08 and 6,912.92

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Solution

The fourth proportional to 21,705.39, 32,559.08 and 6,912.92 is: 10,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.39 : 32,559.08 = 6,912.92 : x
  2. Step 2: Convert to fraction form
    21,705.39/32,559.08 = 6,912.92/x
  3. Step 3: Cross multiply
    21,705.39x = 32,559.08 × 6,912.92
  4. Step 4: Simplify right side
    21,705.39x = 225,078,315.31
  5. Step 5: Solve for x
    x = 225,078,315.31/21,705.39
  6. Step 6: Final answer
    x = 10,369.70

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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.