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Finding the Fourth Proportional to 14,220.61, 19,615.31 and 8,631.61

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Solution

The fourth proportional to 14,220.61, 19,615.31 and 8,631.61 is: 11,906.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,220.61 : 19,615.31 = 8,631.61 : x
  2. Step 2: Convert to fraction form
    14,220.61/19,615.31 = 8,631.61/x
  3. Step 3: Cross multiply
    14,220.61x = 19,615.31 × 8,631.61
  4. Step 4: Simplify right side
    14,220.61x = 169,311,662.79
  5. Step 5: Solve for x
    x = 169,311,662.79/14,220.61
  6. Step 6: Final answer
    x = 11,906.08

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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.