Home / 20,756.57-28,650.17-11,809.07

Finding the Fourth Proportional to 20,756.57, 28,650.17 and 11,809.07

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Solution

The fourth proportional to 20,756.57, 28,650.17 and 11,809.07 is: 16,299.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.57 : 28,650.17 = 11,809.07 : x
  2. Step 2: Convert to fraction form
    20,756.57/28,650.17 = 11,809.07/x
  3. Step 3: Cross multiply
    20,756.57x = 28,650.17 × 11,809.07
  4. Step 4: Simplify right side
    20,756.57x = 338,331,804.00
  5. Step 5: Solve for x
    x = 338,331,804.00/20,756.57
  6. Step 6: Final answer
    x = 16,299.99

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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.