Home / 21,015.34-28,999.42-11,583.88

Finding the Fourth Proportional to 21,015.34, 28,999.42 and 11,583.88

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Solution

The fourth proportional to 21,015.34, 28,999.42 and 11,583.88 is: 15,984.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.34 : 28,999.42 = 11,583.88 : x
  2. Step 2: Convert to fraction form
    21,015.34/28,999.42 = 11,583.88/x
  3. Step 3: Cross multiply
    21,015.34x = 28,999.42 × 11,583.88
  4. Step 4: Simplify right side
    21,015.34x = 335,925,801.35
  5. Step 5: Solve for x
    x = 335,925,801.35/21,015.34
  6. Step 6: Final answer
    x = 15,984.79

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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.