Home / 20,591.92-28,385.40-12,619.36

Finding the Fourth Proportional to 20,591.92, 28,385.40 and 12,619.36

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Solution

The fourth proportional to 20,591.92, 28,385.40 and 12,619.36 is: 17,395.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.92 : 28,385.40 = 12,619.36 : x
  2. Step 2: Convert to fraction form
    20,591.92/28,385.40 = 12,619.36/x
  3. Step 3: Cross multiply
    20,591.92x = 28,385.40 × 12,619.36
  4. Step 4: Simplify right side
    20,591.92x = 358,205,581.34
  5. Step 5: Solve for x
    x = 358,205,581.34/20,591.92
  6. Step 6: Final answer
    x = 17,395.44

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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.