Home / 38,910.87-53,696.42-21,915.14

Finding the Fourth Proportional to 38,910.87, 53,696.42 and 21,915.14

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Solution

The fourth proportional to 38,910.87, 53,696.42 and 21,915.14 is: 30,242.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,910.87 : 53,696.42 = 21,915.14 : x
  2. Step 2: Convert to fraction form
    38,910.87/53,696.42 = 21,915.14/x
  3. Step 3: Cross multiply
    38,910.87x = 53,696.42 × 21,915.14
  4. Step 4: Simplify right side
    38,910.87x = 1,176,764,586.46
  5. Step 5: Solve for x
    x = 1,176,764,586.46/38,910.87
  6. Step 6: Final answer
    x = 30,242.57

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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.