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Finding the Fourth Proportional to 15,868.96, 23,769.96 and 12,731.99

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Solution

The fourth proportional to 15,868.96, 23,769.96 and 12,731.99 is: 19,071.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.96 : 23,769.96 = 12,731.99 : x
  2. Step 2: Convert to fraction form
    15,868.96/23,769.96 = 12,731.99/x
  3. Step 3: Cross multiply
    15,868.96x = 23,769.96 × 12,731.99
  4. Step 4: Simplify right side
    15,868.96x = 302,638,726.43
  5. Step 5: Solve for x
    x = 302,638,726.43/15,868.96
  6. Step 6: Final answer
    x = 19,071.11

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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.