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Finding the Fourth Proportional to 13,759.79, 18,989.08 and 8,094.80

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Solution

The fourth proportional to 13,759.79, 18,989.08 and 8,094.80 is: 11,171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.79 : 18,989.08 = 8,094.80 : x
  2. Step 2: Convert to fraction form
    13,759.79/18,989.08 = 8,094.80/x
  3. Step 3: Cross multiply
    13,759.79x = 18,989.08 × 8,094.80
  4. Step 4: Simplify right side
    13,759.79x = 153,712,877.55
  5. Step 5: Solve for x
    x = 153,712,877.55/13,759.79
  6. Step 6: Final answer
    x = 11,171.16

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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.