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Finding the Fourth Proportional to 14,426.22, 19,908.54 and 8,139

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Solution

The fourth proportional to 14,426.22, 19,908.54 and 8,139 is: 11,232.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,426.22 : 19,908.54 = 8,139 : x
  2. Step 2: Convert to fraction form
    14,426.22/19,908.54 = 8,139/x
  3. Step 3: Cross multiply
    14,426.22x = 19,908.54 × 8,139
  4. Step 4: Simplify right side
    14,426.22x = 162,035,607.06
  5. Step 5: Solve for x
    x = 162,035,607.06/14,426.22
  6. Step 6: Final answer
    x = 11,232.02

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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.