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Finding the Fourth Proportional to 15,843,562.56, 21,864,463.92 and 9,648,899.64

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Solution

The fourth proportional to 15,843,562.56, 21,864,463.92 and 9,648,899.64 is: 13,315,693.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843,562.56 : 21,864,463.92 = 9,648,899.64 : x
  2. Step 2: Convert to fraction form
    15,843,562.56/21,864,463.92 = 9,648,899.64/x
  3. Step 3: Cross multiply
    15,843,562.56x = 21,864,463.92 × 9,648,899.64
  4. Step 4: Simplify right side
    15,843,562.56x = 210,968,018,046,481.03
  5. Step 5: Solve for x
    x = 210,968,018,046,481.03/15,843,562.56
  6. Step 6: Final answer
    x = 13,315,693.19

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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.