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Finding the Fourth Proportional to 15,153.57, 20,911.92 and 9,857.39

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Solution

The fourth proportional to 15,153.57, 20,911.92 and 9,857.39 is: 13,603.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.57 : 20,911.92 = 9,857.39 : x
  2. Step 2: Convert to fraction form
    15,153.57/20,911.92 = 9,857.39/x
  3. Step 3: Cross multiply
    15,153.57x = 20,911.92 × 9,857.39
  4. Step 4: Simplify right side
    15,153.57x = 206,136,846.53
  5. Step 5: Solve for x
    x = 206,136,846.53/15,153.57
  6. Step 6: Final answer
    x = 13,603.19

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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.