Home / 13,654.80-18,843.21-7,686.78

Finding the Fourth Proportional to 13,654.80, 18,843.21 and 7,686.78

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Solution

The fourth proportional to 13,654.80, 18,843.21 and 7,686.78 is: 10,607.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,654.80 : 18,843.21 = 7,686.78 : x
  2. Step 2: Convert to fraction form
    13,654.80/18,843.21 = 7,686.78/x
  3. Step 3: Cross multiply
    13,654.80x = 18,843.21 × 7,686.78
  4. Step 4: Simplify right side
    13,654.80x = 144,843,609.76
  5. Step 5: Solve for x
    x = 144,843,609.76/13,654.80
  6. Step 6: Final answer
    x = 10,607.52

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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.