Home / 21,915.74-30,247.60-12,968.18

Finding the Fourth Proportional to 21,915.74, 30,247.60 and 12,968.18

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Solution

The fourth proportional to 21,915.74, 30,247.60 and 12,968.18 is: 17,898.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.74 : 30,247.60 = 12,968.18 : x
  2. Step 2: Convert to fraction form
    21,915.74/30,247.60 = 12,968.18/x
  3. Step 3: Cross multiply
    21,915.74x = 30,247.60 × 12,968.18
  4. Step 4: Simplify right side
    21,915.74x = 392,256,321.37
  5. Step 5: Solve for x
    x = 392,256,321.37/21,915.74
  6. Step 6: Final answer
    x = 17,898.38

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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.