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Finding the Fourth Proportional to 13,086.53, 18,059.04 and 7,118.45

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Solution

The fourth proportional to 13,086.53, 18,059.04 and 7,118.45 is: 9,823.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,086.53 : 18,059.04 = 7,118.45 : x
  2. Step 2: Convert to fraction form
    13,086.53/18,059.04 = 7,118.45/x
  3. Step 3: Cross multiply
    13,086.53x = 18,059.04 × 7,118.45
  4. Step 4: Simplify right side
    13,086.53x = 128,552,282.99
  5. Step 5: Solve for x
    x = 128,552,282.99/13,086.53
  6. Step 6: Final answer
    x = 9,823.26

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Half scale
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Double scale
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Similar ratio
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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.