Home / 20,516.88-28,307-12,550.80

Finding the Fourth Proportional to 20,516.88, 28,307 and 12,550.80

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Solution

The fourth proportional to 20,516.88, 28,307 and 12,550.80 is: 17,316.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.88 : 28,307 = 12,550.80 : x
  2. Step 2: Convert to fraction form
    20,516.88/28,307 = 12,550.80/x
  3. Step 3: Cross multiply
    20,516.88x = 28,307 × 12,550.80
  4. Step 4: Simplify right side
    20,516.88x = 355,275,495.60
  5. Step 5: Solve for x
    x = 355,275,495.60/20,516.88
  6. Step 6: Final answer
    x = 17,316.25

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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.