Home / 13,656.45-18,845.97-7,688.22

Finding the Fourth Proportional to 13,656.45, 18,845.97 and 7,688.22

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Solution

The fourth proportional to 13,656.45, 18,845.97 and 7,688.22 is: 10,609.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.45 : 18,845.97 = 7,688.22 : x
  2. Step 2: Convert to fraction form
    13,656.45/18,845.97 = 7,688.22/x
  3. Step 3: Cross multiply
    13,656.45x = 18,845.97 × 7,688.22
  4. Step 4: Simplify right side
    13,656.45x = 144,891,963.47
  5. Step 5: Solve for x
    x = 144,891,963.47/13,656.45
  6. Step 6: Final answer
    x = 10,609.78

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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.