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Finding the Fourth Proportional to 13,078.39, 18,048.50 and 7,110.39

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Solution

The fourth proportional to 13,078.39, 18,048.50 and 7,110.39 is: 9,812.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.39 : 18,048.50 = 7,110.39 : x
  2. Step 2: Convert to fraction form
    13,078.39/18,048.50 = 7,110.39/x
  3. Step 3: Cross multiply
    13,078.39x = 18,048.50 × 7,110.39
  4. Step 4: Simplify right side
    13,078.39x = 128,331,873.92
  5. Step 5: Solve for x
    x = 128,331,873.92/13,078.39
  6. Step 6: Final answer
    x = 9,812.51

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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.