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Finding the Fourth Proportional to 39,230.61, 54,138.61 and 21,325.67

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Solution

The fourth proportional to 39,230.61, 54,138.61 and 21,325.67 is: 29,429.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,230.61 : 54,138.61 = 21,325.67 : x
  2. Step 2: Convert to fraction form
    39,230.61/54,138.61 = 21,325.67/x
  3. Step 3: Cross multiply
    39,230.61x = 54,138.61 × 21,325.67
  4. Step 4: Simplify right side
    39,230.61x = 1,154,542,131.12
  5. Step 5: Solve for x
    x = 1,154,542,131.12/39,230.61
  6. Step 6: Final answer
    x = 29,429.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.