Home / 20,868.88-31,313.52-9,180.64

Finding the Fourth Proportional to 20,868.88, 31,313.52 and 9,180.64

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Solution

The fourth proportional to 20,868.88, 31,313.52 and 9,180.64 is: 13,775.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.88 : 31,313.52 = 9,180.64 : x
  2. Step 2: Convert to fraction form
    20,868.88/31,313.52 = 9,180.64/x
  3. Step 3: Cross multiply
    20,868.88x = 31,313.52 × 9,180.64
  4. Step 4: Simplify right side
    20,868.88x = 287,478,154.25
  5. Step 5: Solve for x
    x = 287,478,154.25/20,868.88
  6. Step 6: Final answer
    x = 13,775.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.