Home / 9,639.87-13,303.68-5,390.84

Finding the Fourth Proportional to 9,639.87, 13,303.68 and 5,390.84

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Solution

The fourth proportional to 9,639.87, 13,303.68 and 5,390.84 is: 7,439.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,639.87 : 13,303.68 = 5,390.84 : x
  2. Step 2: Convert to fraction form
    9,639.87/13,303.68 = 5,390.84/x
  3. Step 3: Cross multiply
    9,639.87x = 13,303.68 × 5,390.84
  4. Step 4: Simplify right side
    9,639.87x = 71,718,023.33
  5. Step 5: Solve for x
    x = 71,718,023.33/9,639.87
  6. Step 6: Final answer
    x = 7,439.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.