Home / 20,971.84-28,940.04-11,538.60

Finding the Fourth Proportional to 20,971.84, 28,940.04 and 11,538.60

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Solution

The fourth proportional to 20,971.84, 28,940.04 and 11,538.60 is: 15,922.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.84 : 28,940.04 = 11,538.60 : x
  2. Step 2: Convert to fraction form
    20,971.84/28,940.04 = 11,538.60/x
  3. Step 3: Cross multiply
    20,971.84x = 28,940.04 × 11,538.60
  4. Step 4: Simplify right side
    20,971.84x = 333,927,545.54
  5. Step 5: Solve for x
    x = 333,927,545.54/20,971.84
  6. Step 6: Final answer
    x = 15,922.66

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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.