Home / 28,469.60-39,288.36-15,722.75

Finding the Fourth Proportional to 28,469.60, 39,288.36 and 15,722.75

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Solution

The fourth proportional to 28,469.60, 39,288.36 and 15,722.75 is: 21,697.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.60 : 39,288.36 = 15,722.75 : x
  2. Step 2: Convert to fraction form
    28,469.60/39,288.36 = 15,722.75/x
  3. Step 3: Cross multiply
    28,469.60x = 39,288.36 × 15,722.75
  4. Step 4: Simplify right side
    28,469.60x = 617,721,219.37
  5. Step 5: Solve for x
    x = 617,721,219.37/28,469.60
  6. Step 6: Final answer
    x = 21,697.57

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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.