Home / 20,860.62-28,787.36-11,429.22

Finding the Fourth Proportional to 20,860.62, 28,787.36 and 11,429.22

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Solution

The fourth proportional to 20,860.62, 28,787.36 and 11,429.22 is: 15,772.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.62 : 28,787.36 = 11,429.22 : x
  2. Step 2: Convert to fraction form
    20,860.62/28,787.36 = 11,429.22/x
  3. Step 3: Cross multiply
    20,860.62x = 28,787.36 × 11,429.22
  4. Step 4: Simplify right side
    20,860.62x = 329,017,070.66
  5. Step 5: Solve for x
    x = 329,017,070.66/20,860.62
  6. Step 6: Final answer
    x = 15,772.16

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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.