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Finding the Fourth Proportional to 13,907.76, 19,150.20 and 12,793.20

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Solution

The fourth proportional to 13,907.76, 19,150.20 and 12,793.20 is: 17,615.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,907.76 : 19,150.20 = 12,793.20 : x
  2. Step 2: Convert to fraction form
    13,907.76/19,150.20 = 12,793.20/x
  3. Step 3: Cross multiply
    13,907.76x = 19,150.20 × 12,793.20
  4. Step 4: Simplify right side
    13,907.76x = 244,992,338.64
  5. Step 5: Solve for x
    x = 244,992,338.64/13,907.76
  6. Step 6: Final answer
    x = 17,615.51

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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.