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Finding the Fourth Proportional to 14,423.98, 19,905.06 and 8,136.31

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Solution

The fourth proportional to 14,423.98, 19,905.06 and 8,136.31 is: 11,228.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,423.98 : 19,905.06 = 8,136.31 : x
  2. Step 2: Convert to fraction form
    14,423.98/19,905.06 = 8,136.31/x
  3. Step 3: Cross multiply
    14,423.98x = 19,905.06 × 8,136.31
  4. Step 4: Simplify right side
    14,423.98x = 161,953,738.73
  5. Step 5: Solve for x
    x = 161,953,738.73/14,423.98
  6. Step 6: Final answer
    x = 11,228.09

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1.5x scale

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.