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Finding the Fourth Proportional to 21,485.87, 32,221.08 and 7,442.11

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Solution

The fourth proportional to 21,485.87, 32,221.08 and 7,442.11 is: 11,160.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,485.87 : 32,221.08 = 7,442.11 : x
  2. Step 2: Convert to fraction form
    21,485.87/32,221.08 = 7,442.11/x
  3. Step 3: Cross multiply
    21,485.87x = 32,221.08 × 7,442.11
  4. Step 4: Simplify right side
    21,485.87x = 239,792,784.47
  5. Step 5: Solve for x
    x = 239,792,784.47/21,485.87
  6. Step 6: Final answer
    x = 11,160.49

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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.