Home / 21,224.63-29,290.77-12,728.13

Finding the Fourth Proportional to 21,224.63, 29,290.77 and 12,728.13

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Solution

The fourth proportional to 21,224.63, 29,290.77 and 12,728.13 is: 17,565.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,224.63 : 29,290.77 = 12,728.13 : x
  2. Step 2: Convert to fraction form
    21,224.63/29,290.77 = 12,728.13/x
  3. Step 3: Cross multiply
    21,224.63x = 29,290.77 × 12,728.13
  4. Step 4: Simplify right side
    21,224.63x = 372,816,728.36
  5. Step 5: Solve for x
    x = 372,816,728.36/21,224.63
  6. Step 6: Final answer
    x = 17,565.29

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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.