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Finding the Fourth Proportional to 10,120.99, 15,181.95 and 3,100.50

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Solution

The fourth proportional to 10,120.99, 15,181.95 and 3,100.50 is: 4,650.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.99 : 15,181.95 = 3,100.50 : x
  2. Step 2: Convert to fraction form
    10,120.99/15,181.95 = 3,100.50/x
  3. Step 3: Cross multiply
    10,120.99x = 15,181.95 × 3,100.50
  4. Step 4: Simplify right side
    10,120.99x = 47,071,635.98
  5. Step 5: Solve for x
    x = 47,071,635.98/10,120.99
  6. Step 6: Final answer
    x = 4,650.89

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Similar ratio
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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.