Home / 20,392.84-28,142.22-11,439.82

Finding the Fourth Proportional to 20,392.84, 28,142.22 and 11,439.82

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Solution

The fourth proportional to 20,392.84, 28,142.22 and 11,439.82 is: 15,787.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.84 : 28,142.22 = 11,439.82 : x
  2. Step 2: Convert to fraction form
    20,392.84/28,142.22 = 11,439.82/x
  3. Step 3: Cross multiply
    20,392.84x = 28,142.22 × 11,439.82
  4. Step 4: Simplify right side
    20,392.84x = 321,941,931.20
  5. Step 5: Solve for x
    x = 321,941,931.20/20,392.84
  6. Step 6: Final answer
    x = 15,787.01

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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.