Home / 21,559.48-29,751.97-12,128.11

Finding the Fourth Proportional to 21,559.48, 29,751.97 and 12,128.11

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Solution

The fourth proportional to 21,559.48, 29,751.97 and 12,128.11 is: 16,736.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.48 : 29,751.97 = 12,128.11 : x
  2. Step 2: Convert to fraction form
    21,559.48/29,751.97 = 12,128.11/x
  3. Step 3: Cross multiply
    21,559.48x = 29,751.97 × 12,128.11
  4. Step 4: Simplify right side
    21,559.48x = 360,835,164.88
  5. Step 5: Solve for x
    x = 360,835,164.88/21,559.48
  6. Step 6: Final answer
    x = 16,736.73

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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.