Home / 20,858.60-28,785.33-11,905.93

Finding the Fourth Proportional to 20,858.60, 28,785.33 and 11,905.93

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Solution

The fourth proportional to 20,858.60, 28,785.33 and 11,905.93 is: 16,430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.60 : 28,785.33 = 11,905.93 : x
  2. Step 2: Convert to fraction form
    20,858.60/28,785.33 = 11,905.93/x
  3. Step 3: Cross multiply
    20,858.60x = 28,785.33 × 11,905.93
  4. Step 4: Simplify right side
    20,858.60x = 342,716,124.01
  5. Step 5: Solve for x
    x = 342,716,124.01/20,858.60
  6. Step 6: Final answer
    x = 16,430.45

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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.