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Finding the Fourth Proportional to 19,230.40, 28,845.60 and 13,981.60

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Solution

The fourth proportional to 19,230.40, 28,845.60 and 13,981.60 is: 20,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,230.40 : 28,845.60 = 13,981.60 : x
  2. Step 2: Convert to fraction form
    19,230.40/28,845.60 = 13,981.60/x
  3. Step 3: Cross multiply
    19,230.40x = 28,845.60 × 13,981.60
  4. Step 4: Simplify right side
    19,230.40x = 403,307,640.96
  5. Step 5: Solve for x
    x = 403,307,640.96/19,230.40
  6. Step 6: Final answer
    x = 20,972.40

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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.