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Finding the Fourth Proportional to 13,480.79, 18,605.93 and 7,819.16

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Solution

The fourth proportional to 13,480.79, 18,605.93 and 7,819.16 is: 10,791.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,480.79 : 18,605.93 = 7,819.16 : x
  2. Step 2: Convert to fraction form
    13,480.79/18,605.93 = 7,819.16/x
  3. Step 3: Cross multiply
    13,480.79x = 18,605.93 × 7,819.16
  4. Step 4: Simplify right side
    13,480.79x = 145,482,743.62
  5. Step 5: Solve for x
    x = 145,482,743.62/13,480.79
  6. Step 6: Final answer
    x = 10,791.86

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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.