Home / 21,255-29,331.30-11,823.88

Finding the Fourth Proportional to 21,255, 29,331.30 and 11,823.88

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Solution

The fourth proportional to 21,255, 29,331.30 and 11,823.88 is: 16,316.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255 : 29,331.30 = 11,823.88 : x
  2. Step 2: Convert to fraction form
    21,255/29,331.30 = 11,823.88/x
  3. Step 3: Cross multiply
    21,255x = 29,331.30 × 11,823.88
  4. Step 4: Simplify right side
    21,255x = 346,809,771.44
  5. Step 5: Solve for x
    x = 346,809,771.44/21,255
  6. Step 6: Final answer
    x = 16,316.62

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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.