Home / 6,387.20-8,812.49-3,698.20

Finding the Fourth Proportional to 6,387.20, 8,812.49 and 3,698.20

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Solution

The fourth proportional to 6,387.20, 8,812.49 and 3,698.20 is: 5,102.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.20 : 8,812.49 = 3,698.20 : x
  2. Step 2: Convert to fraction form
    6,387.20/8,812.49 = 3,698.20/x
  3. Step 3: Cross multiply
    6,387.20x = 8,812.49 × 3,698.20
  4. Step 4: Simplify right side
    6,387.20x = 32,590,350.52
  5. Step 5: Solve for x
    x = 32,590,350.52/6,387.20
  6. Step 6: Final answer
    x = 5,102.45

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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.