Home / 13,685.39-18,887.51-7,716.93

Finding the Fourth Proportional to 13,685.39, 18,887.51 and 7,716.93

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Solution

The fourth proportional to 13,685.39, 18,887.51 and 7,716.93 is: 10,650.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.39 : 18,887.51 = 7,716.93 : x
  2. Step 2: Convert to fraction form
    13,685.39/18,887.51 = 7,716.93/x
  3. Step 3: Cross multiply
    13,685.39x = 18,887.51 × 7,716.93
  4. Step 4: Simplify right side
    13,685.39x = 145,753,553.96
  5. Step 5: Solve for x
    x = 145,753,553.96/13,685.39
  6. Step 6: Final answer
    x = 10,650.31

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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.