Home / 19,688.70-27,175.24-15,205.62

Finding the Fourth Proportional to 19,688.70, 27,175.24 and 15,205.62

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Solution

The fourth proportional to 19,688.70, 27,175.24 and 15,205.62 is: 20,987.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,688.70 : 27,175.24 = 15,205.62 : x
  2. Step 2: Convert to fraction form
    19,688.70/27,175.24 = 15,205.62/x
  3. Step 3: Cross multiply
    19,688.70x = 27,175.24 × 15,205.62
  4. Step 4: Simplify right side
    19,688.70x = 413,216,198.96
  5. Step 5: Solve for x
    x = 413,216,198.96/19,688.70
  6. Step 6: Final answer
    x = 20,987.49

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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.