Home / 21,893.20-30,202.12-15,915.60

Finding the Fourth Proportional to 21,893.20, 30,202.12 and 15,915.60

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Solution

The fourth proportional to 21,893.20, 30,202.12 and 15,915.60 is: 21,955.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.20 : 30,202.12 = 15,915.60 : x
  2. Step 2: Convert to fraction form
    21,893.20/30,202.12 = 15,915.60/x
  3. Step 3: Cross multiply
    21,893.20x = 30,202.12 × 15,915.60
  4. Step 4: Simplify right side
    21,893.20x = 480,684,861.07
  5. Step 5: Solve for x
    x = 480,684,861.07/21,893.20
  6. Step 6: Final answer
    x = 21,955.90

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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.