Home / 20,635.67-28,477.34-12,138.17

Finding the Fourth Proportional to 20,635.67, 28,477.34 and 12,138.17

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Solution

The fourth proportional to 20,635.67, 28,477.34 and 12,138.17 is: 16,750.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.67 : 28,477.34 = 12,138.17 : x
  2. Step 2: Convert to fraction form
    20,635.67/28,477.34 = 12,138.17/x
  3. Step 3: Cross multiply
    20,635.67x = 28,477.34 × 12,138.17
  4. Step 4: Simplify right side
    20,635.67x = 345,662,682.03
  5. Step 5: Solve for x
    x = 345,662,682.03/20,635.67
  6. Step 6: Final answer
    x = 16,750.74

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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.