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Finding the Fourth Proportional to 6,388.04, 8,815.20 and 4,398.56

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Solution

The fourth proportional to 6,388.04, 8,815.20 and 4,398.56 is: 6,069.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.04 : 8,815.20 = 4,398.56 : x
  2. Step 2: Convert to fraction form
    6,388.04/8,815.20 = 4,398.56/x
  3. Step 3: Cross multiply
    6,388.04x = 8,815.20 × 4,398.56
  4. Step 4: Simplify right side
    6,388.04x = 38,774,186.11
  5. Step 5: Solve for x
    x = 38,774,186.11/6,388.04
  6. Step 6: Final answer
    x = 6,069.81

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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.