Home / 21,051.78-31,570.92-11,185.44

Finding the Fourth Proportional to 21,051.78, 31,570.92 and 11,185.44

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Solution

The fourth proportional to 21,051.78, 31,570.92 and 11,185.44 is: 16,774.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.78 : 31,570.92 = 11,185.44 : x
  2. Step 2: Convert to fraction form
    21,051.78/31,570.92 = 11,185.44/x
  3. Step 3: Cross multiply
    21,051.78x = 31,570.92 × 11,185.44
  4. Step 4: Simplify right side
    21,051.78x = 353,134,631.40
  5. Step 5: Solve for x
    x = 353,134,631.40/21,051.78
  6. Step 6: Final answer
    x = 16,774.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.