Home / 21,121.33-29,152.62-12,628.48

Finding the Fourth Proportional to 21,121.33, 29,152.62 and 12,628.48

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Solution

The fourth proportional to 21,121.33, 29,152.62 and 12,628.48 is: 17,430.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.33 : 29,152.62 = 12,628.48 : x
  2. Step 2: Convert to fraction form
    21,121.33/29,152.62 = 12,628.48/x
  3. Step 3: Cross multiply
    21,121.33x = 29,152.62 × 12,628.48
  4. Step 4: Simplify right side
    21,121.33x = 368,153,278.62
  5. Step 5: Solve for x
    x = 368,153,278.62/21,121.33
  6. Step 6: Final answer
    x = 17,430.40

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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.