Home / 28,147.16-38,840.94-15,571.64

Finding the Fourth Proportional to 28,147.16, 38,840.94 and 15,571.64

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Solution

The fourth proportional to 28,147.16, 38,840.94 and 15,571.64 is: 21,487.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,147.16 : 38,840.94 = 15,571.64 : x
  2. Step 2: Convert to fraction form
    28,147.16/38,840.94 = 15,571.64/x
  3. Step 3: Cross multiply
    28,147.16x = 38,840.94 × 15,571.64
  4. Step 4: Simplify right side
    28,147.16x = 604,817,134.94
  5. Step 5: Solve for x
    x = 604,817,134.94/28,147.16
  6. Step 6: Final answer
    x = 21,487.68

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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.