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Finding the Fourth Proportional to 15,892.06, 21,931.53 and 8,819.14

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Solution

The fourth proportional to 15,892.06, 21,931.53 and 8,819.14 is: 12,170.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892.06 : 21,931.53 = 8,819.14 : x
  2. Step 2: Convert to fraction form
    15,892.06/21,931.53 = 8,819.14/x
  3. Step 3: Cross multiply
    15,892.06x = 21,931.53 × 8,819.14
  4. Step 4: Simplify right side
    15,892.06x = 193,417,233.48
  5. Step 5: Solve for x
    x = 193,417,233.48/15,892.06
  6. Step 6: Final answer
    x = 12,170.68

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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.