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Finding the Fourth Proportional to 8,637.65, 12,939.27 and 6,656.36

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Solution

The fourth proportional to 8,637.65, 12,939.27 and 6,656.36 is: 9,971.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637.65 : 12,939.27 = 6,656.36 : x
  2. Step 2: Convert to fraction form
    8,637.65/12,939.27 = 6,656.36/x
  3. Step 3: Cross multiply
    8,637.65x = 12,939.27 × 6,656.36
  4. Step 4: Simplify right side
    8,637.65x = 86,128,374.56
  5. Step 5: Solve for x
    x = 86,128,374.56/8,637.65
  6. Step 6: Final answer
    x = 9,971.28

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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.