Home / 5,417.20-8,120.15-2,640.07

Finding the Fourth Proportional to 5,417.20, 8,120.15 and 2,640.07

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Solution

The fourth proportional to 5,417.20, 8,120.15 and 2,640.07 is: 3,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,417.20 : 8,120.15 = 2,640.07 : x
  2. Step 2: Convert to fraction form
    5,417.20/8,120.15 = 2,640.07/x
  3. Step 3: Cross multiply
    5,417.20x = 8,120.15 × 2,640.07
  4. Step 4: Simplify right side
    5,417.20x = 21,437,748.42
  5. Step 5: Solve for x
    x = 21,437,748.42/5,417.20
  6. Step 6: Final answer
    x = 3,957.35

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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.