Home / 20,295.60-27,989.79-12,742.63

Finding the Fourth Proportional to 20,295.60, 27,989.79 and 12,742.63

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Solution

The fourth proportional to 20,295.60, 27,989.79 and 12,742.63 is: 17,573.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.60 : 27,989.79 = 12,742.63 : x
  2. Step 2: Convert to fraction form
    20,295.60/27,989.79 = 12,742.63/x
  3. Step 3: Cross multiply
    20,295.60x = 27,989.79 × 12,742.63
  4. Step 4: Simplify right side
    20,295.60x = 356,663,537.75
  5. Step 5: Solve for x
    x = 356,663,537.75/20,295.60
  6. Step 6: Final answer
    x = 17,573.44

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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.