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Finding the Fourth Proportional to 7,510.60, 11,268.60 and 3,129.40

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Solution

The fourth proportional to 7,510.60, 11,268.60 and 3,129.40 is: 4,695.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,510.60 : 11,268.60 = 3,129.40 : x
  2. Step 2: Convert to fraction form
    7,510.60/11,268.60 = 3,129.40/x
  3. Step 3: Cross multiply
    7,510.60x = 11,268.60 × 3,129.40
  4. Step 4: Simplify right side
    7,510.60x = 35,263,956.84
  5. Step 5: Solve for x
    x = 35,263,956.84/7,510.60
  6. Step 6: Final answer
    x = 4,695.22

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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.