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Finding the Fourth Proportional to 11,812.13, 17,720.63 and 4,886.63

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Solution

The fourth proportional to 11,812.13, 17,720.63 and 4,886.63 is: 7,330.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,812.13 : 17,720.63 = 4,886.63 : x
  2. Step 2: Convert to fraction form
    11,812.13/17,720.63 = 4,886.63/x
  3. Step 3: Cross multiply
    11,812.13x = 17,720.63 × 4,886.63
  4. Step 4: Simplify right side
    11,812.13x = 86,594,049.14
  5. Step 5: Solve for x
    x = 86,594,049.14/11,812.13
  6. Step 6: Final answer
    x = 7,330.95

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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.