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Finding the Fourth Proportional to 13,078.87, 18,048.86 and 7,110.52

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Solution

The fourth proportional to 13,078.87, 18,048.86 and 7,110.52 is: 9,812.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.87 : 18,048.86 = 7,110.52 : x
  2. Step 2: Convert to fraction form
    13,078.87/18,048.86 = 7,110.52/x
  3. Step 3: Cross multiply
    13,078.87x = 18,048.86 × 7,110.52
  4. Step 4: Simplify right side
    13,078.87x = 128,336,780.01
  5. Step 5: Solve for x
    x = 128,336,780.01/13,078.87
  6. Step 6: Final answer
    x = 9,812.53

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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.