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Finding the Fourth Proportional to 13,768.18, 18,999.48 and 7,799.71

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Solution

The fourth proportional to 13,768.18, 18,999.48 and 7,799.71 is: 10,763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,768.18 : 18,999.48 = 7,799.71 : x
  2. Step 2: Convert to fraction form
    13,768.18/18,999.48 = 7,799.71/x
  3. Step 3: Cross multiply
    13,768.18x = 18,999.48 × 7,799.71
  4. Step 4: Simplify right side
    13,768.18x = 148,190,434.15
  5. Step 5: Solve for x
    x = 148,190,434.15/13,768.18
  6. Step 6: Final answer
    x = 10,763.26

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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.