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Finding the Fourth Proportional to 15,503, 21,394.38 and 8,429.44

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Solution

The fourth proportional to 15,503, 21,394.38 and 8,429.44 is: 11,632.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503 : 21,394.38 = 8,429.44 : x
  2. Step 2: Convert to fraction form
    15,503/21,394.38 = 8,429.44/x
  3. Step 3: Cross multiply
    15,503x = 21,394.38 × 8,429.44
  4. Step 4: Simplify right side
    15,503x = 180,342,642.55
  5. Step 5: Solve for x
    x = 180,342,642.55/15,503
  6. Step 6: Final answer
    x = 11,632.76

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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.