Home / 20,491.76-28,268.43-12,520.10

Finding the Fourth Proportional to 20,491.76, 28,268.43 and 12,520.10

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Solution

The fourth proportional to 20,491.76, 28,268.43 and 12,520.10 is: 17,271.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.76 : 28,268.43 = 12,520.10 : x
  2. Step 2: Convert to fraction form
    20,491.76/28,268.43 = 12,520.10/x
  3. Step 3: Cross multiply
    20,491.76x = 28,268.43 × 12,520.10
  4. Step 4: Simplify right side
    20,491.76x = 353,923,570.44
  5. Step 5: Solve for x
    x = 353,923,570.44/20,491.76
  6. Step 6: Final answer
    x = 17,271.51

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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.