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Finding the Fourth Proportional to 8,492.72, 11,720.69 and 4,957.07

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Solution

The fourth proportional to 8,492.72, 11,720.69 and 4,957.07 is: 6,841.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,492.72 : 11,720.69 = 4,957.07 : x
  2. Step 2: Convert to fraction form
    8,492.72/11,720.69 = 4,957.07/x
  3. Step 3: Cross multiply
    8,492.72x = 11,720.69 × 4,957.07
  4. Step 4: Simplify right side
    8,492.72x = 58,100,197.39
  5. Step 5: Solve for x
    x = 58,100,197.39/8,492.72
  6. Step 6: Final answer
    x = 6,841.18

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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.