Home / 6,430.87-9,639.70-3,139.92

Finding the Fourth Proportional to 6,430.87, 9,639.70 and 3,139.92

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Solution

The fourth proportional to 6,430.87, 9,639.70 and 3,139.92 is: 4,706.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,430.87 : 9,639.70 = 3,139.92 : x
  2. Step 2: Convert to fraction form
    6,430.87/9,639.70 = 3,139.92/x
  3. Step 3: Cross multiply
    6,430.87x = 9,639.70 × 3,139.92
  4. Step 4: Simplify right side
    6,430.87x = 30,267,886.82
  5. Step 5: Solve for x
    x = 30,267,886.82/6,430.87
  6. Step 6: Final answer
    x = 4,706.66

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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.