Home / 21,166.49-31,727.51-7,121.64

Finding the Fourth Proportional to 21,166.49, 31,727.51 and 7,121.64

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Solution

The fourth proportional to 21,166.49, 31,727.51 and 7,121.64 is: 10,674.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.49 : 31,727.51 = 7,121.64 : x
  2. Step 2: Convert to fraction form
    21,166.49/31,727.51 = 7,121.64/x
  3. Step 3: Cross multiply
    21,166.49x = 31,727.51 × 7,121.64
  4. Step 4: Simplify right side
    21,166.49x = 225,951,838.20
  5. Step 5: Solve for x
    x = 225,951,838.20/21,166.49
  6. Step 6: Final answer
    x = 10,674.98

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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.