Home / 20,295.59-27,989.78-12,742.62

Finding the Fourth Proportional to 20,295.59, 27,989.78 and 12,742.62

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Solution

The fourth proportional to 20,295.59, 27,989.78 and 12,742.62 is: 17,573.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.59 : 27,989.78 = 12,742.62 : x
  2. Step 2: Convert to fraction form
    20,295.59/27,989.78 = 12,742.62/x
  3. Step 3: Cross multiply
    20,295.59x = 27,989.78 × 12,742.62
  4. Step 4: Simplify right side
    20,295.59x = 356,663,130.42
  5. Step 5: Solve for x
    x = 356,663,130.42/20,295.59
  6. Step 6: Final answer
    x = 17,573.43

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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.