Home / 20,647.80-28,495.86-11,695.68

Finding the Fourth Proportional to 20,647.80, 28,495.86 and 11,695.68

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Solution

The fourth proportional to 20,647.80, 28,495.86 and 11,695.68 is: 16,141.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.80 : 28,495.86 = 11,695.68 : x
  2. Step 2: Convert to fraction form
    20,647.80/28,495.86 = 11,695.68/x
  3. Step 3: Cross multiply
    20,647.80x = 28,495.86 × 11,695.68
  4. Step 4: Simplify right side
    20,647.80x = 333,278,317.41
  5. Step 5: Solve for x
    x = 333,278,317.41/20,647.80
  6. Step 6: Final answer
    x = 16,141.11

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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.