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Finding the Fourth Proportional to 15,484.47, 21,368.96 and 8,769.99

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Solution

The fourth proportional to 15,484.47, 21,368.96 and 8,769.99 is: 12,102.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,484.47 : 21,368.96 = 8,769.99 : x
  2. Step 2: Convert to fraction form
    15,484.47/21,368.96 = 8,769.99/x
  3. Step 3: Cross multiply
    15,484.47x = 21,368.96 × 8,769.99
  4. Step 4: Simplify right side
    15,484.47x = 187,405,634.68
  5. Step 5: Solve for x
    x = 187,405,634.68/15,484.47
  6. Step 6: Final answer
    x = 12,102.82

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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.