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Finding the Fourth Proportional to 15,185.52, 20,955.18 and 9,520.50

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Solution

The fourth proportional to 15,185.52, 20,955.18 and 9,520.50 is: 13,137.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,185.52 : 20,955.18 = 9,520.50 : x
  2. Step 2: Convert to fraction form
    15,185.52/20,955.18 = 9,520.50/x
  3. Step 3: Cross multiply
    15,185.52x = 20,955.18 × 9,520.50
  4. Step 4: Simplify right side
    15,185.52x = 199,503,791.19
  5. Step 5: Solve for x
    x = 199,503,791.19/15,185.52
  6. Step 6: Final answer
    x = 13,137.76

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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.