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Finding the Fourth Proportional to 7,987.79, 11,987.13 and 4,094.93

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Solution

The fourth proportional to 7,987.79, 11,987.13 and 4,094.93 is: 6,145.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.79 : 11,987.13 = 4,094.93 : x
  2. Step 2: Convert to fraction form
    7,987.79/11,987.13 = 4,094.93/x
  3. Step 3: Cross multiply
    7,987.79x = 11,987.13 × 4,094.93
  4. Step 4: Simplify right side
    7,987.79x = 49,086,458.25
  5. Step 5: Solve for x
    x = 49,086,458.25/7,987.79
  6. Step 6: Final answer
    x = 6,145.19

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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.