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Finding the Fourth Proportional to 13,086.64, 18,059.90 and 7,118.65

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Solution

The fourth proportional to 13,086.64, 18,059.90 and 7,118.65 is: 9,823.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,086.64 : 18,059.90 = 7,118.65 : x
  2. Step 2: Convert to fraction form
    13,086.64/18,059.90 = 7,118.65/x
  3. Step 3: Cross multiply
    13,086.64x = 18,059.90 × 7,118.65
  4. Step 4: Simplify right side
    13,086.64x = 128,562,107.14
  5. Step 5: Solve for x
    x = 128,562,107.14/13,086.64
  6. Step 6: Final answer
    x = 9,823.92

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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.