Home / 21,815.46-30,096.68-12,615.32

Finding the Fourth Proportional to 21,815.46, 30,096.68 and 12,615.32

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Solution

The fourth proportional to 21,815.46, 30,096.68 and 12,615.32 is: 17,404.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.46 : 30,096.68 = 12,615.32 : x
  2. Step 2: Convert to fraction form
    21,815.46/30,096.68 = 12,615.32/x
  3. Step 3: Cross multiply
    21,815.46x = 30,096.68 × 12,615.32
  4. Step 4: Simplify right side
    21,815.46x = 379,679,205.43
  5. Step 5: Solve for x
    x = 379,679,205.43/21,815.46
  6. Step 6: Final answer
    x = 17,404.13

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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.