Home / 12,121-16,727.18-7,929.25

Finding the Fourth Proportional to 12,121, 16,727.18 and 7,929.25

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Solution

The fourth proportional to 12,121, 16,727.18 and 7,929.25 is: 10,942.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121 : 16,727.18 = 7,929.25 : x
  2. Step 2: Convert to fraction form
    12,121/16,727.18 = 7,929.25/x
  3. Step 3: Cross multiply
    12,121x = 16,727.18 × 7,929.25
  4. Step 4: Simplify right side
    12,121x = 132,634,011.84
  5. Step 5: Solve for x
    x = 132,634,011.84/12,121
  6. Step 6: Final answer
    x = 10,942.50

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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.