Home / 21,011-28,995.18-11,580.44

Finding the Fourth Proportional to 21,011, 28,995.18 and 11,580.44

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Solution

The fourth proportional to 21,011, 28,995.18 and 11,580.44 is: 15,981.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011 : 28,995.18 = 11,580.44 : x
  2. Step 2: Convert to fraction form
    21,011/28,995.18 = 11,580.44/x
  3. Step 3: Cross multiply
    21,011x = 28,995.18 × 11,580.44
  4. Step 4: Simplify right side
    21,011x = 335,776,942.28
  5. Step 5: Solve for x
    x = 335,776,942.28/21,011
  6. Step 6: Final answer
    x = 15,981.01

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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.