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Finding the Fourth Proportional to 19,090.72, 28,636.08 and 9,857.44

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Solution

The fourth proportional to 19,090.72, 28,636.08 and 9,857.44 is: 14,786.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,090.72 : 28,636.08 = 9,857.44 : x
  2. Step 2: Convert to fraction form
    19,090.72/28,636.08 = 9,857.44/x
  3. Step 3: Cross multiply
    19,090.72x = 28,636.08 × 9,857.44
  4. Step 4: Simplify right side
    19,090.72x = 282,278,440.44
  5. Step 5: Solve for x
    x = 282,278,440.44/19,090.72
  6. Step 6: Final answer
    x = 14,786.16

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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.