Home / 20,670.89-28,525.74-11,239.44

Finding the Fourth Proportional to 20,670.89, 28,525.74 and 11,239.44

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Solution

The fourth proportional to 20,670.89, 28,525.74 and 11,239.44 is: 15,510.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.89 : 28,525.74 = 11,239.44 : x
  2. Step 2: Convert to fraction form
    20,670.89/28,525.74 = 11,239.44/x
  3. Step 3: Cross multiply
    20,670.89x = 28,525.74 × 11,239.44
  4. Step 4: Simplify right side
    20,670.89x = 320,613,343.19
  5. Step 5: Solve for x
    x = 320,613,343.19/20,670.89
  6. Step 6: Final answer
    x = 15,510.38

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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.