Home / 20,763.78-28,653.90-11,332.32

Finding the Fourth Proportional to 20,763.78, 28,653.90 and 11,332.32

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Solution

The fourth proportional to 20,763.78, 28,653.90 and 11,332.32 is: 15,638.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.78 : 28,653.90 = 11,332.32 : x
  2. Step 2: Convert to fraction form
    20,763.78/28,653.90 = 11,332.32/x
  3. Step 3: Cross multiply
    20,763.78x = 28,653.90 × 11,332.32
  4. Step 4: Simplify right side
    20,763.78x = 324,715,164.05
  5. Step 5: Solve for x
    x = 324,715,164.05/20,763.78
  6. Step 6: Final answer
    x = 15,638.54

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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.