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Finding the Fourth Proportional to 21,697.92, 32,553.12 and 6,909.12

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Solution

The fourth proportional to 21,697.92, 32,553.12 and 6,909.12 is: 10,365.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.92 : 32,553.12 = 6,909.12 : x
  2. Step 2: Convert to fraction form
    21,697.92/32,553.12 = 6,909.12/x
  3. Step 3: Cross multiply
    21,697.92x = 32,553.12 × 6,909.12
  4. Step 4: Simplify right side
    21,697.92x = 224,913,412.45
  5. Step 5: Solve for x
    x = 224,913,412.45/21,697.92
  6. Step 6: Final answer
    x = 10,365.67

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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.