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Finding the Fourth Proportional to 21,342.78, 32,014.18 and 7,491.78

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Solution

The fourth proportional to 21,342.78, 32,014.18 and 7,491.78 is: 11,237.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.78 : 32,014.18 = 7,491.78 : x
  2. Step 2: Convert to fraction form
    21,342.78/32,014.18 = 7,491.78/x
  3. Step 3: Cross multiply
    21,342.78x = 32,014.18 × 7,491.78
  4. Step 4: Simplify right side
    21,342.78x = 239,843,193.44
  5. Step 5: Solve for x
    x = 239,843,193.44/21,342.78
  6. Step 6: Final answer
    x = 11,237.67

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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.