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Finding the Fourth Proportional to 15,065.88, 20,791.62 and 9,403.98

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Solution

The fourth proportional to 15,065.88, 20,791.62 and 9,403.98 is: 12,977.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.88 : 20,791.62 = 9,403.98 : x
  2. Step 2: Convert to fraction form
    15,065.88/20,791.62 = 9,403.98/x
  3. Step 3: Cross multiply
    15,065.88x = 20,791.62 × 9,403.98
  4. Step 4: Simplify right side
    15,065.88x = 195,523,978.65
  5. Step 5: Solve for x
    x = 195,523,978.65/15,065.88
  6. Step 6: Final answer
    x = 12,977.93

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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.