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Finding the Fourth Proportional to 15,698.76, 21,664.20 and 8,625.03

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Solution

The fourth proportional to 15,698.76, 21,664.20 and 8,625.03 is: 11,902.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,698.76 : 21,664.20 = 8,625.03 : x
  2. Step 2: Convert to fraction form
    15,698.76/21,664.20 = 8,625.03/x
  3. Step 3: Cross multiply
    15,698.76x = 21,664.20 × 8,625.03
  4. Step 4: Simplify right side
    15,698.76x = 186,854,374.93
  5. Step 5: Solve for x
    x = 186,854,374.93/15,698.76
  6. Step 6: Final answer
    x = 11,902.49

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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.