Home / 2,115.76-2,918.08-1,406.32

Finding the Fourth Proportional to 2,115.76, 2,918.08 and 1,406.32

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Solution

The fourth proportional to 2,115.76, 2,918.08 and 1,406.32 is: 1,939.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.76 : 2,918.08 = 1,406.32 : x
  2. Step 2: Convert to fraction form
    2,115.76/2,918.08 = 1,406.32/x
  3. Step 3: Cross multiply
    2,115.76x = 2,918.08 × 1,406.32
  4. Step 4: Simplify right side
    2,115.76x = 4,103,754.27
  5. Step 5: Solve for x
    x = 4,103,754.27/2,115.76
  6. Step 6: Final answer
    x = 1,939.61

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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.