Home / 7,127.20-10,690.80-2,509.60

Finding the Fourth Proportional to 7,127.20, 10,690.80 and 2,509.60

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Solution

The fourth proportional to 7,127.20, 10,690.80 and 2,509.60 is: 3,764.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,127.20 : 10,690.80 = 2,509.60 : x
  2. Step 2: Convert to fraction form
    7,127.20/10,690.80 = 2,509.60/x
  3. Step 3: Cross multiply
    7,127.20x = 10,690.80 × 2,509.60
  4. Step 4: Simplify right side
    7,127.20x = 26,829,631.68
  5. Step 5: Solve for x
    x = 26,829,631.68/7,127.20
  6. Step 6: Final answer
    x = 3,764.40

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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.