Home / 20,516.76-28,317.18-12,019.80

Finding the Fourth Proportional to 20,516.76, 28,317.18 and 12,019.80

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Solution

The fourth proportional to 20,516.76, 28,317.18 and 12,019.80 is: 16,589.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.76 : 28,317.18 = 12,019.80 : x
  2. Step 2: Convert to fraction form
    20,516.76/28,317.18 = 12,019.80/x
  3. Step 3: Cross multiply
    20,516.76x = 28,317.18 × 12,019.80
  4. Step 4: Simplify right side
    20,516.76x = 340,366,840.16
  5. Step 5: Solve for x
    x = 340,366,840.16/20,516.76
  6. Step 6: Final answer
    x = 16,589.70

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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.