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Finding the Fourth Proportional to 13,752.17, 18,978.11 and 8,087.03

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Solution

The fourth proportional to 13,752.17, 18,978.11 and 8,087.03 is: 11,160.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.17 : 18,978.11 = 8,087.03 : x
  2. Step 2: Convert to fraction form
    13,752.17/18,978.11 = 8,087.03/x
  3. Step 3: Cross multiply
    13,752.17x = 18,978.11 × 8,087.03
  4. Step 4: Simplify right side
    13,752.17x = 153,476,409.59
  5. Step 5: Solve for x
    x = 153,476,409.59/13,752.17
  6. Step 6: Final answer
    x = 11,160.16

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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.