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Finding the Fourth Proportional to 13,630.42, 18,809.13 and 7,662.01

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Solution

The fourth proportional to 13,630.42, 18,809.13 and 7,662.01 is: 10,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.42 : 18,809.13 = 7,662.01 : x
  2. Step 2: Convert to fraction form
    13,630.42/18,809.13 = 7,662.01/x
  3. Step 3: Cross multiply
    13,630.42x = 18,809.13 × 7,662.01
  4. Step 4: Simplify right side
    13,630.42x = 144,115,742.15
  5. Step 5: Solve for x
    x = 144,115,742.15/13,630.42
  6. Step 6: Final answer
    x = 10,573.10

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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.