Home / 20,619.12-28,454.40-11,666.44

Finding the Fourth Proportional to 20,619.12, 28,454.40 and 11,666.44

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Solution

The fourth proportional to 20,619.12, 28,454.40 and 11,666.44 is: 16,099.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.12 : 28,454.40 = 11,666.44 : x
  2. Step 2: Convert to fraction form
    20,619.12/28,454.40 = 11,666.44/x
  3. Step 3: Cross multiply
    20,619.12x = 28,454.40 × 11,666.44
  4. Step 4: Simplify right side
    20,619.12x = 331,961,550.34
  5. Step 5: Solve for x
    x = 331,961,550.34/20,619.12
  6. Step 6: Final answer
    x = 16,099.70

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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.