Home / 12,175.79-18,218.39-10,688.00

Finding the Fourth Proportional to 12,175.79, 18,218.39 and 10,688.00

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Solution

The fourth proportional to 12,175.79, 18,218.39 and 10,688.00 is: 15,992.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,175.79 : 18,218.39 = 10,688.00 : x
  2. Step 2: Convert to fraction form
    12,175.79/18,218.39 = 10,688.00/x
  3. Step 3: Cross multiply
    12,175.79x = 18,218.39 × 10,688.00
  4. Step 4: Simplify right side
    12,175.79x = 194,718,007.79
  5. Step 5: Solve for x
    x = 194,718,007.79/12,175.79
  6. Step 6: Final answer
    x = 15,992.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.