Home / 20,580.75-28,401.93-12,618.36

Finding the Fourth Proportional to 20,580.75, 28,401.93 and 12,618.36

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Solution

The fourth proportional to 20,580.75, 28,401.93 and 12,618.36 is: 17,413.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.75 : 28,401.93 = 12,618.36 : x
  2. Step 2: Convert to fraction form
    20,580.75/28,401.93 = 12,618.36/x
  3. Step 3: Cross multiply
    20,580.75x = 28,401.93 × 12,618.36
  4. Step 4: Simplify right side
    20,580.75x = 358,385,777.43
  5. Step 5: Solve for x
    x = 358,385,777.43/20,580.75
  6. Step 6: Final answer
    x = 17,413.64

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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.