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Finding the Fourth Proportional to 14,999.63, 20,699.51 and 8,712

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Solution

The fourth proportional to 14,999.63, 20,699.51 and 8,712 is: 12,022.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,999.63 : 20,699.51 = 8,712 : x
  2. Step 2: Convert to fraction form
    14,999.63/20,699.51 = 8,712/x
  3. Step 3: Cross multiply
    14,999.63x = 20,699.51 × 8,712
  4. Step 4: Simplify right side
    14,999.63x = 180,334,087.56
  5. Step 5: Solve for x
    x = 180,334,087.56/14,999.63
  6. Step 6: Final answer
    x = 12,022.57

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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.