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Finding the Fourth Proportional to 21,104.87, 31,658.97 and 7,064.98

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Solution

The fourth proportional to 21,104.87, 31,658.97 and 7,064.98 is: 10,598.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.87 : 31,658.97 = 7,064.98 : x
  2. Step 2: Convert to fraction form
    21,104.87/31,658.97 = 7,064.98/x
  3. Step 3: Cross multiply
    21,104.87x = 31,658.97 × 7,064.98
  4. Step 4: Simplify right side
    21,104.87x = 223,669,989.87
  5. Step 5: Solve for x
    x = 223,669,989.87/21,104.87
  6. Step 6: Final answer
    x = 10,598.03

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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.