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Finding the Fourth Proportional to 13,996,878.20, 20,995,317.30 and 3,899,499.20

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Solution

The fourth proportional to 13,996,878.20, 20,995,317.30 and 3,899,499.20 is: 5,849,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,996,878.20 : 20,995,317.30 = 3,899,499.20 : x
  2. Step 2: Convert to fraction form
    13,996,878.20/20,995,317.30 = 3,899,499.20/x
  3. Step 3: Cross multiply
    13,996,878.20x = 20,995,317.30 × 3,899,499.20
  4. Step 4: Simplify right side
    13,996,878.20x = 81,871,223,015,096.17
  5. Step 5: Solve for x
    x = 81,871,223,015,096.17/13,996,878.20
  6. Step 6: Final answer
    x = 5,849,248.80

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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.