Home / 19,720.21-29,584.50-5,680.12

Finding the Fourth Proportional to 19,720.21, 29,584.50 and 5,680.12

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Solution

The fourth proportional to 19,720.21, 29,584.50 and 5,680.12 is: 8,521.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.21 : 29,584.50 = 5,680.12 : x
  2. Step 2: Convert to fraction form
    19,720.21/29,584.50 = 5,680.12/x
  3. Step 3: Cross multiply
    19,720.21x = 29,584.50 × 5,680.12
  4. Step 4: Simplify right side
    19,720.21x = 168,043,510.14
  5. Step 5: Solve for x
    x = 168,043,510.14/19,720.21
  6. Step 6: Final answer
    x = 8,521.39

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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.