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Finding the Fourth Proportional to 21,930.83, 32,888.48 and 7,136.99

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Solution

The fourth proportional to 21,930.83, 32,888.48 and 7,136.99 is: 10,702.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,930.83 : 32,888.48 = 7,136.99 : x
  2. Step 2: Convert to fraction form
    21,930.83/32,888.48 = 7,136.99/x
  3. Step 3: Cross multiply
    21,930.83x = 32,888.48 × 7,136.99
  4. Step 4: Simplify right side
    21,930.83x = 234,724,716.23
  5. Step 5: Solve for x
    x = 234,724,716.23/21,930.83
  6. Step 6: Final answer
    x = 10,702.96

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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.