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Finding the Fourth Proportional to 14,409.77, 21,573.91 and 7,639.94

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Solution

The fourth proportional to 14,409.77, 21,573.91 and 7,639.94 is: 11,438.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,409.77 : 21,573.91 = 7,639.94 : x
  2. Step 2: Convert to fraction form
    14,409.77/21,573.91 = 7,639.94/x
  3. Step 3: Cross multiply
    14,409.77x = 21,573.91 × 7,639.94
  4. Step 4: Simplify right side
    14,409.77x = 164,823,377.97
  5. Step 5: Solve for x
    x = 164,823,377.97/14,409.77
  6. Step 6: Final answer
    x = 11,438.31

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1.5x scale

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.