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Finding the Fourth Proportional to 7,751.72, 11,637.90 and 4,056.90

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Solution

The fourth proportional to 7,751.72, 11,637.90 and 4,056.90 is: 6,090.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,751.72 : 11,637.90 = 4,056.90 : x
  2. Step 2: Convert to fraction form
    7,751.72/11,637.90 = 4,056.90/x
  3. Step 3: Cross multiply
    7,751.72x = 11,637.90 × 4,056.90
  4. Step 4: Simplify right side
    7,751.72x = 47,213,796.51
  5. Step 5: Solve for x
    x = 47,213,796.51/7,751.72
  6. Step 6: Final answer
    x = 6,090.75

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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.