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Finding the Fourth Proportional to 12,588.72, 17,366.04 and 8,389.68

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Solution

The fourth proportional to 12,588.72, 17,366.04 and 8,389.68 is: 11,573.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,588.72 : 17,366.04 = 8,389.68 : x
  2. Step 2: Convert to fraction form
    12,588.72/17,366.04 = 8,389.68/x
  3. Step 3: Cross multiply
    12,588.72x = 17,366.04 × 8,389.68
  4. Step 4: Simplify right side
    12,588.72x = 145,695,518.47
  5. Step 5: Solve for x
    x = 145,695,518.47/12,588.72
  6. Step 6: Final answer
    x = 11,573.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.