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Finding the Fourth Proportional to 8,390.58, 12,585.46 and 3,125.58

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Solution

The fourth proportional to 8,390.58, 12,585.46 and 3,125.58 is: 4,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.58 : 12,585.46 = 3,125.58 : x
  2. Step 2: Convert to fraction form
    8,390.58/12,585.46 = 3,125.58/x
  3. Step 3: Cross multiply
    8,390.58x = 12,585.46 × 3,125.58
  4. Step 4: Simplify right side
    8,390.58x = 39,336,862.07
  5. Step 5: Solve for x
    x = 39,336,862.07/8,390.58
  6. Step 6: Final answer
    x = 4,688.22

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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.