Home / 5,639.32-7,783.19-3,869.47

Finding the Fourth Proportional to 5,639.32, 7,783.19 and 3,869.47

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Solution

The fourth proportional to 5,639.32, 7,783.19 and 3,869.47 is: 5,340.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.32 : 7,783.19 = 3,869.47 : x
  2. Step 2: Convert to fraction form
    5,639.32/7,783.19 = 3,869.47/x
  3. Step 3: Cross multiply
    5,639.32x = 7,783.19 × 3,869.47
  4. Step 4: Simplify right side
    5,639.32x = 30,116,820.21
  5. Step 5: Solve for x
    x = 30,116,820.21/5,639.32
  6. Step 6: Final answer
    x = 5,340.51

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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.