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Finding the Fourth Proportional to 13,186.62, 19,785.12 and 5,785.92

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Solution

The fourth proportional to 13,186.62, 19,785.12 and 5,785.92 is: 8,681.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.62 : 19,785.12 = 5,785.92 : x
  2. Step 2: Convert to fraction form
    13,186.62/19,785.12 = 5,785.92/x
  3. Step 3: Cross multiply
    13,186.62x = 19,785.12 × 5,785.92
  4. Step 4: Simplify right side
    13,186.62x = 114,475,121.51
  5. Step 5: Solve for x
    x = 114,475,121.51/13,186.62
  6. Step 6: Final answer
    x = 8,681.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.