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Finding the Fourth Proportional to 15,000.96, 20,699.52 and 8,712

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Solution

The fourth proportional to 15,000.96, 20,699.52 and 8,712 is: 12,021.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.96 : 20,699.52 = 8,712 : x
  2. Step 2: Convert to fraction form
    15,000.96/20,699.52 = 8,712/x
  3. Step 3: Cross multiply
    15,000.96x = 20,699.52 × 8,712
  4. Step 4: Simplify right side
    15,000.96x = 180,334,218.24
  5. Step 5: Solve for x
    x = 180,334,218.24/15,000.96
  6. Step 6: Final answer
    x = 12,021.51

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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.