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Finding the Fourth Proportional to 8,585.60, 12,880.08 and 3,655.20

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Solution

The fourth proportional to 8,585.60, 12,880.08 and 3,655.20 is: 5,483.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,585.60 : 12,880.08 = 3,655.20 : x
  2. Step 2: Convert to fraction form
    8,585.60/12,880.08 = 3,655.20/x
  3. Step 3: Cross multiply
    8,585.60x = 12,880.08 × 3,655.20
  4. Step 4: Simplify right side
    8,585.60x = 47,079,268.42
  5. Step 5: Solve for x
    x = 47,079,268.42/8,585.60
  6. Step 6: Final answer
    x = 5,483.52

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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.