Home / 21,141.62-29,175.65-12,756.50

Finding the Fourth Proportional to 21,141.62, 29,175.65 and 12,756.50

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Solution

The fourth proportional to 21,141.62, 29,175.65 and 12,756.50 is: 17,604.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141.62 : 29,175.65 = 12,756.50 : x
  2. Step 2: Convert to fraction form
    21,141.62/29,175.65 = 12,756.50/x
  3. Step 3: Cross multiply
    21,141.62x = 29,175.65 × 12,756.50
  4. Step 4: Simplify right side
    21,141.62x = 372,179,179.23
  5. Step 5: Solve for x
    x = 372,179,179.23/21,141.62
  6. Step 6: Final answer
    x = 17,604.10

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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.