Home / 6,405.20-8,840.78-3,612.32

Finding the Fourth Proportional to 6,405.20, 8,840.78 and 3,612.32

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Solution

The fourth proportional to 6,405.20, 8,840.78 and 3,612.32 is: 4,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405.20 : 8,840.78 = 3,612.32 : x
  2. Step 2: Convert to fraction form
    6,405.20/8,840.78 = 3,612.32/x
  3. Step 3: Cross multiply
    6,405.20x = 8,840.78 × 3,612.32
  4. Step 4: Simplify right side
    6,405.20x = 31,935,664.14
  5. Step 5: Solve for x
    x = 31,935,664.14/6,405.20
  6. Step 6: Final answer
    x = 4,985.90

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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.