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Finding the Fourth Proportional to 15,902.80, 21,941.41 and 9,940.53

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Solution

The fourth proportional to 15,902.80, 21,941.41 and 9,940.53 is: 13,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,902.80 : 21,941.41 = 9,940.53 : x
  2. Step 2: Convert to fraction form
    15,902.80/21,941.41 = 9,940.53/x
  3. Step 3: Cross multiply
    15,902.80x = 21,941.41 × 9,940.53
  4. Step 4: Simplify right side
    15,902.80x = 218,109,244.35
  5. Step 5: Solve for x
    x = 218,109,244.35/15,902.80
  6. Step 6: Final answer
    x = 13,715.15

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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.