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Finding the Fourth Proportional to 13,434.48, 18,539.55 and 7,845.48

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Solution

The fourth proportional to 13,434.48, 18,539.55 and 7,845.48 is: 10,826.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,434.48 : 18,539.55 = 7,845.48 : x
  2. Step 2: Convert to fraction form
    13,434.48/18,539.55 = 7,845.48/x
  3. Step 3: Cross multiply
    13,434.48x = 18,539.55 × 7,845.48
  4. Step 4: Simplify right side
    13,434.48x = 145,451,668.73
  5. Step 5: Solve for x
    x = 145,451,668.73/13,434.48
  6. Step 6: Final answer
    x = 10,826.74

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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.