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Finding the Fourth Proportional to 13,880.92, 19,128.48 and 9,890.92

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Solution

The fourth proportional to 13,880.92, 19,128.48 and 9,890.92 is: 13,630.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.92 : 19,128.48 = 9,890.92 : x
  2. Step 2: Convert to fraction form
    13,880.92/19,128.48 = 9,890.92/x
  3. Step 3: Cross multiply
    13,880.92x = 19,128.48 × 9,890.92
  4. Step 4: Simplify right side
    13,880.92x = 189,198,265.40
  5. Step 5: Solve for x
    x = 189,198,265.40/13,880.92
  6. Step 6: Final answer
    x = 13,630.10

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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.