Home / 20,520.99-28,323.36-12,962.51

Finding the Fourth Proportional to 20,520.99, 28,323.36 and 12,962.51

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Solution

The fourth proportional to 20,520.99, 28,323.36 and 12,962.51 is: 17,891.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.99 : 28,323.36 = 12,962.51 : x
  2. Step 2: Convert to fraction form
    20,520.99/28,323.36 = 12,962.51/x
  3. Step 3: Cross multiply
    20,520.99x = 28,323.36 × 12,962.51
  4. Step 4: Simplify right side
    20,520.99x = 367,141,850.44
  5. Step 5: Solve for x
    x = 367,141,850.44/20,520.99
  6. Step 6: Final answer
    x = 17,891.04

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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.