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Finding the Fourth Proportional to 13,630.64, 18,810.24 and 7,662.32

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Solution

The fourth proportional to 13,630.64, 18,810.24 and 7,662.32 is: 10,573.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.64 : 18,810.24 = 7,662.32 : x
  2. Step 2: Convert to fraction form
    13,630.64/18,810.24 = 7,662.32/x
  3. Step 3: Cross multiply
    13,630.64x = 18,810.24 × 7,662.32
  4. Step 4: Simplify right side
    13,630.64x = 144,130,078.16
  5. Step 5: Solve for x
    x = 144,130,078.16/13,630.64
  6. Step 6: Final answer
    x = 10,573.98

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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.