Home / 7,815.80-10,787.64-5,163.32

Finding the Fourth Proportional to 7,815.80, 10,787.64 and 5,163.32

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Solution

The fourth proportional to 7,815.80, 10,787.64 and 5,163.32 is: 7,126.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.80 : 10,787.64 = 5,163.32 : x
  2. Step 2: Convert to fraction form
    7,815.80/10,787.64 = 5,163.32/x
  3. Step 3: Cross multiply
    7,815.80x = 10,787.64 × 5,163.32
  4. Step 4: Simplify right side
    7,815.80x = 55,700,037.36
  5. Step 5: Solve for x
    x = 55,700,037.36/7,815.80
  6. Step 6: Final answer
    x = 7,126.59

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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.