Home / 4,215.60-5,815.02-2,640.96

Finding the Fourth Proportional to 4,215.60, 5,815.02 and 2,640.96

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Solution

The fourth proportional to 4,215.60, 5,815.02 and 2,640.96 is: 3,642.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,215.60 : 5,815.02 = 2,640.96 : x
  2. Step 2: Convert to fraction form
    4,215.60/5,815.02 = 2,640.96/x
  3. Step 3: Cross multiply
    4,215.60x = 5,815.02 × 2,640.96
  4. Step 4: Simplify right side
    4,215.60x = 15,357,235.22
  5. Step 5: Solve for x
    x = 15,357,235.22/4,215.60
  6. Step 6: Final answer
    x = 3,642.95

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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.