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Finding the Fourth Proportional to 12,620.00, 18,921.16 and 9,064.31

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Solution

The fourth proportional to 12,620.00, 18,921.16 and 9,064.31 is: 13,590.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.00 : 18,921.16 = 9,064.31 : x
  2. Step 2: Convert to fraction form
    12,620.00/18,921.16 = 9,064.31/x
  3. Step 3: Cross multiply
    12,620.00x = 18,921.16 × 9,064.31
  4. Step 4: Simplify right side
    12,620.00x = 171,507,176.52
  5. Step 5: Solve for x
    x = 171,507,176.52/12,620.00
  6. Step 6: Final answer
    x = 13,590.11

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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.