Home / 28,239.72-38,968.26-15,664.44

Finding the Fourth Proportional to 28,239.72, 38,968.26 and 15,664.44

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Solution

The fourth proportional to 28,239.72, 38,968.26 and 15,664.44 is: 21,615.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.72 : 38,968.26 = 15,664.44 : x
  2. Step 2: Convert to fraction form
    28,239.72/38,968.26 = 15,664.44/x
  3. Step 3: Cross multiply
    28,239.72x = 38,968.26 × 15,664.44
  4. Step 4: Simplify right side
    28,239.72x = 610,415,970.67
  5. Step 5: Solve for x
    x = 610,415,970.67/28,239.72
  6. Step 6: Final answer
    x = 21,615.51

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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.