Home / 21,723.76-29,968.95-12,771.64

Finding the Fourth Proportional to 21,723.76, 29,968.95 and 12,771.64

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Solution

The fourth proportional to 21,723.76, 29,968.95 and 12,771.64 is: 17,619.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.76 : 29,968.95 = 12,771.64 : x
  2. Step 2: Convert to fraction form
    21,723.76/29,968.95 = 12,771.64/x
  3. Step 3: Cross multiply
    21,723.76x = 29,968.95 × 12,771.64
  4. Step 4: Simplify right side
    21,723.76x = 382,752,640.58
  5. Step 5: Solve for x
    x = 382,752,640.58/21,723.76
  6. Step 6: Final answer
    x = 17,619.08

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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.