Home / 28,147.36-38,840.64-15,571.84

Finding the Fourth Proportional to 28,147.36, 38,840.64 and 15,571.84

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Solution

The fourth proportional to 28,147.36, 38,840.64 and 15,571.84 is: 21,487.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,147.36 : 38,840.64 = 15,571.84 : x
  2. Step 2: Convert to fraction form
    28,147.36/38,840.64 = 15,571.84/x
  3. Step 3: Cross multiply
    28,147.36x = 38,840.64 × 15,571.84
  4. Step 4: Simplify right side
    28,147.36x = 604,820,231.58
  5. Step 5: Solve for x
    x = 604,820,231.58/28,147.36
  6. Step 6: Final answer
    x = 21,487.64

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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.