Home / 21,520.90-29,698.35-11,960.83

Finding the Fourth Proportional to 21,520.90, 29,698.35 and 11,960.83

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Solution

The fourth proportional to 21,520.90, 29,698.35 and 11,960.83 is: 16,505.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.90 : 29,698.35 = 11,960.83 : x
  2. Step 2: Convert to fraction form
    21,520.90/29,698.35 = 11,960.83/x
  3. Step 3: Cross multiply
    21,520.90x = 29,698.35 × 11,960.83
  4. Step 4: Simplify right side
    21,520.90x = 355,216,915.63
  5. Step 5: Solve for x
    x = 355,216,915.63/21,520.90
  6. Step 6: Final answer
    x = 16,505.67

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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.