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Finding the Fourth Proportional to 15,045.62, 20,762.97 and 8,239.61

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Solution

The fourth proportional to 15,045.62, 20,762.97 and 8,239.61 is: 11,370.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,045.62 : 20,762.97 = 8,239.61 : x
  2. Step 2: Convert to fraction form
    15,045.62/20,762.97 = 8,239.61/x
  3. Step 3: Cross multiply
    15,045.62x = 20,762.97 × 8,239.61
  4. Step 4: Simplify right side
    15,045.62x = 171,078,775.24
  5. Step 5: Solve for x
    x = 171,078,775.24/15,045.62
  6. Step 6: Final answer
    x = 11,370.67

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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.