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Finding the Fourth Proportional to 13,080.40, 18,055.08 and 8,364.70

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Solution

The fourth proportional to 13,080.40, 18,055.08 and 8,364.70 is: 11,545.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,080.40 : 18,055.08 = 8,364.70 : x
  2. Step 2: Convert to fraction form
    13,080.40/18,055.08 = 8,364.70/x
  3. Step 3: Cross multiply
    13,080.40x = 18,055.08 × 8,364.70
  4. Step 4: Simplify right side
    13,080.40x = 151,025,327.68
  5. Step 5: Solve for x
    x = 151,025,327.68/13,080.40
  6. Step 6: Final answer
    x = 11,545.93

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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.