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Finding the Fourth Proportional to 13,309,005.20, 19,963,507.80 and 4,786,266.20

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Solution

The fourth proportional to 13,309,005.20, 19,963,507.80 and 4,786,266.20 is: 7,179,399.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,309,005.20 : 19,963,507.80 = 4,786,266.20 : x
  2. Step 2: Convert to fraction form
    13,309,005.20/19,963,507.80 = 4,786,266.20/x
  3. Step 3: Cross multiply
    13,309,005.20x = 19,963,507.80 × 4,786,266.20
  4. Step 4: Simplify right side
    13,309,005.20x = 95,550,662,616,576.38
  5. Step 5: Solve for x
    x = 95,550,662,616,576.38/13,309,005.20
  6. Step 6: Final answer
    x = 7,179,399.30

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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.