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Finding the Fourth Proportional to 15,154.53, 20,913.17 and 8,866.77

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Solution

The fourth proportional to 15,154.53, 20,913.17 and 8,866.77 is: 12,236.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.53 : 20,913.17 = 8,866.77 : x
  2. Step 2: Convert to fraction form
    15,154.53/20,913.17 = 8,866.77/x
  3. Step 3: Cross multiply
    15,154.53x = 20,913.17 × 8,866.77
  4. Step 4: Simplify right side
    15,154.53x = 185,432,224.03
  5. Step 5: Solve for x
    x = 185,432,224.03/15,154.53
  6. Step 6: Final answer
    x = 12,236.09

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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.