Home / 21,120.48-29,147.04-12,735.36

Finding the Fourth Proportional to 21,120.48, 29,147.04 and 12,735.36

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Solution

The fourth proportional to 21,120.48, 29,147.04 and 12,735.36 is: 17,575.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.48 : 29,147.04 = 12,735.36 : x
  2. Step 2: Convert to fraction form
    21,120.48/29,147.04 = 12,735.36/x
  3. Step 3: Cross multiply
    21,120.48x = 29,147.04 × 12,735.36
  4. Step 4: Simplify right side
    21,120.48x = 371,198,047.33
  5. Step 5: Solve for x
    x = 371,198,047.33/21,120.48
  6. Step 6: Final answer
    x = 17,575.27

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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.