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Finding the Fourth Proportional to 11,731.60, 17,640.60 and 9,830.80

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Solution

The fourth proportional to 11,731.60, 17,640.60 and 9,830.80 is: 14,782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,731.60 : 17,640.60 = 9,830.80 : x
  2. Step 2: Convert to fraction form
    11,731.60/17,640.60 = 9,830.80/x
  3. Step 3: Cross multiply
    11,731.60x = 17,640.60 × 9,830.80
  4. Step 4: Simplify right side
    11,731.60x = 173,421,210.48
  5. Step 5: Solve for x
    x = 173,421,210.48/11,731.60
  6. Step 6: Final answer
    x = 14,782.40

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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.