Home / 3,129.84-4,318.61-2,121.93

Finding the Fourth Proportional to 3,129.84, 4,318.61 and 2,121.93

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Solution

The fourth proportional to 3,129.84, 4,318.61 and 2,121.93 is: 2,927.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.84 : 4,318.61 = 2,121.93 : x
  2. Step 2: Convert to fraction form
    3,129.84/4,318.61 = 2,121.93/x
  3. Step 3: Cross multiply
    3,129.84x = 4,318.61 × 2,121.93
  4. Step 4: Simplify right side
    3,129.84x = 9,163,777.51
  5. Step 5: Solve for x
    x = 9,163,777.51/3,129.84
  6. Step 6: Final answer
    x = 2,927.87

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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.