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Finding the Fourth Proportional to 8,574.72, 12,857.76 and 4,185.60

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Solution

The fourth proportional to 8,574.72, 12,857.76 and 4,185.60 is: 6,276.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,574.72 : 12,857.76 = 4,185.60 : x
  2. Step 2: Convert to fraction form
    8,574.72/12,857.76 = 4,185.60/x
  3. Step 3: Cross multiply
    8,574.72x = 12,857.76 × 4,185.60
  4. Step 4: Simplify right side
    8,574.72x = 53,817,440.26
  5. Step 5: Solve for x
    x = 53,817,440.26/8,574.72
  6. Step 6: Final answer
    x = 6,276.29

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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.