Home / 7,139.64-10,707.30-3,439.56

Finding the Fourth Proportional to 7,139.64, 10,707.30 and 3,439.56

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Solution

The fourth proportional to 7,139.64, 10,707.30 and 3,439.56 is: 5,158.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.64 : 10,707.30 = 3,439.56 : x
  2. Step 2: Convert to fraction form
    7,139.64/10,707.30 = 3,439.56/x
  3. Step 3: Cross multiply
    7,139.64x = 10,707.30 × 3,439.56
  4. Step 4: Simplify right side
    7,139.64x = 36,828,400.79
  5. Step 5: Solve for x
    x = 36,828,400.79/7,139.64
  6. Step 6: Final answer
    x = 5,158.30

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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.