Home / 28,353.53-39,129.41-15,778.55

Finding the Fourth Proportional to 28,353.53, 39,129.41 and 15,778.55

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Solution

The fourth proportional to 28,353.53, 39,129.41 and 15,778.55 is: 21,775.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,353.53 : 39,129.41 = 15,778.55 : x
  2. Step 2: Convert to fraction form
    28,353.53/39,129.41 = 15,778.55/x
  3. Step 3: Cross multiply
    28,353.53x = 39,129.41 × 15,778.55
  4. Step 4: Simplify right side
    28,353.53x = 617,405,273.26
  5. Step 5: Solve for x
    x = 617,405,273.26/28,353.53
  6. Step 6: Final answer
    x = 21,775.25

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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.