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Finding the Fourth Proportional to 19,491.55, 29,238.05 and 8,815.87

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Solution

The fourth proportional to 19,491.55, 29,238.05 and 8,815.87 is: 13,224.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,491.55 : 29,238.05 = 8,815.87 : x
  2. Step 2: Convert to fraction form
    19,491.55/29,238.05 = 8,815.87/x
  3. Step 3: Cross multiply
    19,491.55x = 29,238.05 × 8,815.87
  4. Step 4: Simplify right side
    19,491.55x = 257,758,803.77
  5. Step 5: Solve for x
    x = 257,758,803.77/19,491.55
  6. Step 6: Final answer
    x = 13,224.13

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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.