Home / 2,115.60-2,905.91-1,872.60

Finding the Fourth Proportional to 2,115.60, 2,905.91 and 1,872.60

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Solution

The fourth proportional to 2,115.60, 2,905.91 and 1,872.60 is: 2,572.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.60 : 2,905.91 = 1,872.60 : x
  2. Step 2: Convert to fraction form
    2,115.60/2,905.91 = 1,872.60/x
  3. Step 3: Cross multiply
    2,115.60x = 2,905.91 × 1,872.60
  4. Step 4: Simplify right side
    2,115.60x = 5,441,597.70
  5. Step 5: Solve for x
    x = 5,441,597.70/2,115.60
  6. Step 6: Final answer
    x = 2,572.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.