Home / 20,871.92-28,803.54-11,439.86

Finding the Fourth Proportional to 20,871.92, 28,803.54 and 11,439.86

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Solution

The fourth proportional to 20,871.92, 28,803.54 and 11,439.86 is: 15,787.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.92 : 28,803.54 = 11,439.86 : x
  2. Step 2: Convert to fraction form
    20,871.92/28,803.54 = 11,439.86/x
  3. Step 3: Cross multiply
    20,871.92x = 28,803.54 × 11,439.86
  4. Step 4: Simplify right side
    20,871.92x = 329,508,465.10
  5. Step 5: Solve for x
    x = 329,508,465.10/20,871.92
  6. Step 6: Final answer
    x = 15,787.17

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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.