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Finding the Fourth Proportional to 13,630.59, 18,810.10 and 7,662.19

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Solution

The fourth proportional to 13,630.59, 18,810.10 and 7,662.19 is: 10,573.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.59 : 18,810.10 = 7,662.19 : x
  2. Step 2: Convert to fraction form
    13,630.59/18,810.10 = 7,662.19/x
  3. Step 3: Cross multiply
    13,630.59x = 18,810.10 × 7,662.19
  4. Step 4: Simplify right side
    13,630.59x = 144,126,560.12
  5. Step 5: Solve for x
    x = 144,126,560.12/13,630.59
  6. Step 6: Final answer
    x = 10,573.76

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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.