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Finding the Fourth Proportional to 21,679.55, 32,521.92 and 7,636.67

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Solution

The fourth proportional to 21,679.55, 32,521.92 and 7,636.67 is: 11,455.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.55 : 32,521.92 = 7,636.67 : x
  2. Step 2: Convert to fraction form
    21,679.55/32,521.92 = 7,636.67/x
  3. Step 3: Cross multiply
    21,679.55x = 32,521.92 × 7,636.67
  4. Step 4: Simplify right side
    21,679.55x = 248,359,008.20
  5. Step 5: Solve for x
    x = 248,359,008.20/21,679.55
  6. Step 6: Final answer
    x = 11,455.91

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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.