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Finding the Fourth Proportional to 12,449.76, 18,669.20 and 6,605.04

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Solution

The fourth proportional to 12,449.76, 18,669.20 and 6,605.04 is: 9,904.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,449.76 : 18,669.20 = 6,605.04 : x
  2. Step 2: Convert to fraction form
    12,449.76/18,669.20 = 6,605.04/x
  3. Step 3: Cross multiply
    12,449.76x = 18,669.20 × 6,605.04
  4. Step 4: Simplify right side
    12,449.76x = 123,310,812.77
  5. Step 5: Solve for x
    x = 123,310,812.77/12,449.76
  6. Step 6: Final answer
    x = 9,904.67

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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.