Home / 28,145.25-38,840.46-15,571.89

Finding the Fourth Proportional to 28,145.25, 38,840.46 and 15,571.89

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Solution

The fourth proportional to 28,145.25, 38,840.46 and 15,571.89 is: 21,489.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.25 : 38,840.46 = 15,571.89 : x
  2. Step 2: Convert to fraction form
    28,145.25/38,840.46 = 15,571.89/x
  3. Step 3: Cross multiply
    28,145.25x = 38,840.46 × 15,571.89
  4. Step 4: Simplify right side
    28,145.25x = 604,819,370.67
  5. Step 5: Solve for x
    x = 604,819,370.67/28,145.25
  6. Step 6: Final answer
    x = 21,489.22

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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.