Home / 5,815.12-8,721.46-1,918.64

Finding the Fourth Proportional to 5,815.12, 8,721.46 and 1,918.64

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Solution

The fourth proportional to 5,815.12, 8,721.46 and 1,918.64 is: 2,877.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.12 : 8,721.46 = 1,918.64 : x
  2. Step 2: Convert to fraction form
    5,815.12/8,721.46 = 1,918.64/x
  3. Step 3: Cross multiply
    5,815.12x = 8,721.46 × 1,918.64
  4. Step 4: Simplify right side
    5,815.12x = 16,733,342.01
  5. Step 5: Solve for x
    x = 16,733,342.01/5,815.12
  6. Step 6: Final answer
    x = 2,877.56

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1.5x scale

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.