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Finding the Fourth Proportional to 21,485.74, 32,220.89 and 7,441.98

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Solution

The fourth proportional to 21,485.74, 32,220.89 and 7,441.98 is: 11,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,485.74 : 32,220.89 = 7,441.98 : x
  2. Step 2: Convert to fraction form
    21,485.74/32,220.89 = 7,441.98/x
  3. Step 3: Cross multiply
    21,485.74x = 32,220.89 × 7,441.98
  4. Step 4: Simplify right side
    21,485.74x = 239,787,181.75
  5. Step 5: Solve for x
    x = 239,787,181.75/21,485.74
  6. Step 6: Final answer
    x = 11,160.30

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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.