Home / 20,176.86-30,280.94-13,980.30

Finding the Fourth Proportional to 20,176.86, 30,280.94 and 13,980.30

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Solution

The fourth proportional to 20,176.86, 30,280.94 and 13,980.30 is: 20,981.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,176.86 : 30,280.94 = 13,980.30 : x
  2. Step 2: Convert to fraction form
    20,176.86/30,280.94 = 13,980.30/x
  3. Step 3: Cross multiply
    20,176.86x = 30,280.94 × 13,980.30
  4. Step 4: Simplify right side
    20,176.86x = 423,336,625.48
  5. Step 5: Solve for x
    x = 423,336,625.48/20,176.86
  6. Step 6: Final answer
    x = 20,981.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.