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Finding the Fourth Proportional to 15,698.30, 21,664.06 and 8,624.90

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Solution

The fourth proportional to 15,698.30, 21,664.06 and 8,624.90 is: 11,902.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,698.30 : 21,664.06 = 8,624.90 : x
  2. Step 2: Convert to fraction form
    15,698.30/21,664.06 = 8,624.90/x
  3. Step 3: Cross multiply
    15,698.30x = 21,664.06 × 8,624.90
  4. Step 4: Simplify right side
    15,698.30x = 186,850,383.69
  5. Step 5: Solve for x
    x = 186,850,383.69/15,698.30
  6. Step 6: Final answer
    x = 11,902.59

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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.