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Finding the Fourth Proportional to 18,792.76, 28,190.80 and 4,941.76

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Solution

The fourth proportional to 18,792.76, 28,190.80 and 4,941.76 is: 7,413.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.76 : 28,190.80 = 4,941.76 : x
  2. Step 2: Convert to fraction form
    18,792.76/28,190.80 = 4,941.76/x
  3. Step 3: Cross multiply
    18,792.76x = 28,190.80 × 4,941.76
  4. Step 4: Simplify right side
    18,792.76x = 139,312,167.81
  5. Step 5: Solve for x
    x = 139,312,167.81/18,792.76
  6. Step 6: Final answer
    x = 7,413.08

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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.