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Finding the Fourth Proportional to 14,424.21, 19,905.71 and 8,136.59

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Solution

The fourth proportional to 14,424.21, 19,905.71 and 8,136.59 is: 11,228.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,424.21 : 19,905.71 = 8,136.59 : x
  2. Step 2: Convert to fraction form
    14,424.21/19,905.71 = 8,136.59/x
  3. Step 3: Cross multiply
    14,424.21x = 19,905.71 × 8,136.59
  4. Step 4: Simplify right side
    14,424.21x = 161,964,460.72
  5. Step 5: Solve for x
    x = 161,964,460.72/14,424.21
  6. Step 6: Final answer
    x = 11,228.65

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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.