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Finding the Fourth Proportional to 13,648.48, 18,836.01 and 7,679.80

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Solution

The fourth proportional to 13,648.48, 18,836.01 and 7,679.80 is: 10,598.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,648.48 : 18,836.01 = 7,679.80 : x
  2. Step 2: Convert to fraction form
    13,648.48/18,836.01 = 7,679.80/x
  3. Step 3: Cross multiply
    13,648.48x = 18,836.01 × 7,679.80
  4. Step 4: Simplify right side
    13,648.48x = 144,656,789.60
  5. Step 5: Solve for x
    x = 144,656,789.60/13,648.48
  6. Step 6: Final answer
    x = 10,598.75

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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.