Home / 5,378.87-7,415.80-3,887.14

Finding the Fourth Proportional to 5,378.87, 7,415.80 and 3,887.14

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Solution

The fourth proportional to 5,378.87, 7,415.80 and 3,887.14 is: 5,359.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.87 : 7,415.80 = 3,887.14 : x
  2. Step 2: Convert to fraction form
    5,378.87/7,415.80 = 3,887.14/x
  3. Step 3: Cross multiply
    5,378.87x = 7,415.80 × 3,887.14
  4. Step 4: Simplify right side
    5,378.87x = 28,826,252.81
  5. Step 5: Solve for x
    x = 28,826,252.81/5,378.87
  6. Step 6: Final answer
    x = 5,359.17

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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.