Home / 20,580.74-28,401.94-12,618.34

Finding the Fourth Proportional to 20,580.74, 28,401.94 and 12,618.34

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Solution

The fourth proportional to 20,580.74, 28,401.94 and 12,618.34 is: 17,413.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.74 : 28,401.94 = 12,618.34 : x
  2. Step 2: Convert to fraction form
    20,580.74/28,401.94 = 12,618.34/x
  3. Step 3: Cross multiply
    20,580.74x = 28,401.94 × 12,618.34
  4. Step 4: Simplify right side
    20,580.74x = 358,385,335.58
  5. Step 5: Solve for x
    x = 358,385,335.58/20,580.74
  6. Step 6: Final answer
    x = 17,413.63

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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.