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Finding the Fourth Proportional to 6,409.60, 8,845.04 and 3,925.60

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Solution

The fourth proportional to 6,409.60, 8,845.04 and 3,925.60 is: 5,417.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.60 : 8,845.04 = 3,925.60 : x
  2. Step 2: Convert to fraction form
    6,409.60/8,845.04 = 3,925.60/x
  3. Step 3: Cross multiply
    6,409.60x = 8,845.04 × 3,925.60
  4. Step 4: Simplify right side
    6,409.60x = 34,722,089.02
  5. Step 5: Solve for x
    x = 34,722,089.02/6,409.60
  6. Step 6: Final answer
    x = 5,417.20

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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.