Home / 20,422.74-30,606.84-10,915.57

Finding the Fourth Proportional to 20,422.74, 30,606.84 and 10,915.57

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Solution

The fourth proportional to 20,422.74, 30,606.84 and 10,915.57 is: 16,358.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.74 : 30,606.84 = 10,915.57 : x
  2. Step 2: Convert to fraction form
    20,422.74/30,606.84 = 10,915.57/x
  3. Step 3: Cross multiply
    20,422.74x = 30,606.84 × 10,915.57
  4. Step 4: Simplify right side
    20,422.74x = 334,091,104.50
  5. Step 5: Solve for x
    x = 334,091,104.50/20,422.74
  6. Step 6: Final answer
    x = 16,358.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.