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Finding the Fourth Proportional to 13,753.45, 18,978.68 and 8,088.41

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Solution

The fourth proportional to 13,753.45, 18,978.68 and 8,088.41 is: 11,161.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753.45 : 18,978.68 = 8,088.41 : x
  2. Step 2: Convert to fraction form
    13,753.45/18,978.68 = 8,088.41/x
  3. Step 3: Cross multiply
    13,753.45x = 18,978.68 × 8,088.41
  4. Step 4: Simplify right side
    13,753.45x = 153,507,283.26
  5. Step 5: Solve for x
    x = 153,507,283.26/13,753.45
  6. Step 6: Final answer
    x = 11,161.37

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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.