Home / 21,145.98-29,181.44-11,586.47

Finding the Fourth Proportional to 21,145.98, 29,181.44 and 11,586.47

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Solution

The fourth proportional to 21,145.98, 29,181.44 and 11,586.47 is: 15,989.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.98 : 29,181.44 = 11,586.47 : x
  2. Step 2: Convert to fraction form
    21,145.98/29,181.44 = 11,586.47/x
  3. Step 3: Cross multiply
    21,145.98x = 29,181.44 × 11,586.47
  4. Step 4: Simplify right side
    21,145.98x = 338,109,675.28
  5. Step 5: Solve for x
    x = 338,109,675.28/21,145.98
  6. Step 6: Final answer
    x = 15,989.31

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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.