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Finding the Fourth Proportional to 19,336.40, 28,961.40 and 15,880.40

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Solution

The fourth proportional to 19,336.40, 28,961.40 and 15,880.40 is: 23,785.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,336.40 : 28,961.40 = 15,880.40 : x
  2. Step 2: Convert to fraction form
    19,336.40/28,961.40 = 15,880.40/x
  3. Step 3: Cross multiply
    19,336.40x = 28,961.40 × 15,880.40
  4. Step 4: Simplify right side
    19,336.40x = 459,918,616.56
  5. Step 5: Solve for x
    x = 459,918,616.56/19,336.40
  6. Step 6: Final answer
    x = 23,785.12

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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.