Home / 20,578.08-28,397.50-12,078.70

Finding the Fourth Proportional to 20,578.08, 28,397.50 and 12,078.70

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Solution

The fourth proportional to 20,578.08, 28,397.50 and 12,078.70 is: 16,668.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.08 : 28,397.50 = 12,078.70 : x
  2. Step 2: Convert to fraction form
    20,578.08/28,397.50 = 12,078.70/x
  3. Step 3: Cross multiply
    20,578.08x = 28,397.50 × 12,078.70
  4. Step 4: Simplify right side
    20,578.08x = 343,004,883.25
  5. Step 5: Solve for x
    x = 343,004,883.25/20,578.08
  6. Step 6: Final answer
    x = 16,668.46

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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.