Home / 20,470.96-28,240.73-12,511.69

Finding the Fourth Proportional to 20,470.96, 28,240.73 and 12,511.69

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Solution

The fourth proportional to 20,470.96, 28,240.73 and 12,511.69 is: 17,260.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.96 : 28,240.73 = 12,511.69 : x
  2. Step 2: Convert to fraction form
    20,470.96/28,240.73 = 12,511.69/x
  3. Step 3: Cross multiply
    20,470.96x = 28,240.73 × 12,511.69
  4. Step 4: Simplify right side
    20,470.96x = 353,339,259.13
  5. Step 5: Solve for x
    x = 353,339,259.13/20,470.96
  6. Step 6: Final answer
    x = 17,260.51

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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.