Home / 20,756.65-28,644.07-11,325.21

Finding the Fourth Proportional to 20,756.65, 28,644.07 and 11,325.21

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Solution

The fourth proportional to 20,756.65, 28,644.07 and 11,325.21 is: 15,628.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.65 : 28,644.07 = 11,325.21 : x
  2. Step 2: Convert to fraction form
    20,756.65/28,644.07 = 11,325.21/x
  3. Step 3: Cross multiply
    20,756.65x = 28,644.07 × 11,325.21
  4. Step 4: Simplify right side
    20,756.65x = 324,400,108.00
  5. Step 5: Solve for x
    x = 324,400,108.00/20,756.65
  6. Step 6: Final answer
    x = 15,628.73

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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.