Home / 28,289.60-39,023.41-17,660.78

Finding the Fourth Proportional to 28,289.60, 39,023.41 and 17,660.78

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Solution

The fourth proportional to 28,289.60, 39,023.41 and 17,660.78 is: 24,361.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.60 : 39,023.41 = 17,660.78 : x
  2. Step 2: Convert to fraction form
    28,289.60/39,023.41 = 17,660.78/x
  3. Step 3: Cross multiply
    28,289.60x = 39,023.41 × 17,660.78
  4. Step 4: Simplify right side
    28,289.60x = 689,183,749.37
  5. Step 5: Solve for x
    x = 689,183,749.37/28,289.60
  6. Step 6: Final answer
    x = 24,361.74

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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.