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Finding the Fourth Proportional to 14,353.95, 19,809.11 and 7,981.20

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Solution

The fourth proportional to 14,353.95, 19,809.11 and 7,981.20 is: 11,014.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,353.95 : 19,809.11 = 7,981.20 : x
  2. Step 2: Convert to fraction form
    14,353.95/19,809.11 = 7,981.20/x
  3. Step 3: Cross multiply
    14,353.95x = 19,809.11 × 7,981.20
  4. Step 4: Simplify right side
    14,353.95x = 158,100,369.69
  5. Step 5: Solve for x
    x = 158,100,369.69/14,353.95
  6. Step 6: Final answer
    x = 11,014.42

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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.