Home / 13,656.08-18,843.60-7,686.80

Finding the Fourth Proportional to 13,656.08, 18,843.60 and 7,686.80

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Solution

The fourth proportional to 13,656.08, 18,843.60 and 7,686.80 is: 10,606.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.08 : 18,843.60 = 7,686.80 : x
  2. Step 2: Convert to fraction form
    13,656.08/18,843.60 = 7,686.80/x
  3. Step 3: Cross multiply
    13,656.08x = 18,843.60 × 7,686.80
  4. Step 4: Simplify right side
    13,656.08x = 144,846,984.48
  5. Step 5: Solve for x
    x = 144,846,984.48/13,656.08
  6. Step 6: Final answer
    x = 10,606.78

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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.