Home / 39,043.13-53,879.56-21,138.15

Finding the Fourth Proportional to 39,043.13, 53,879.56 and 21,138.15

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Solution

The fourth proportional to 39,043.13, 53,879.56 and 21,138.15 is: 29,170.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.13 : 53,879.56 = 21,138.15 : x
  2. Step 2: Convert to fraction form
    39,043.13/53,879.56 = 21,138.15/x
  3. Step 3: Cross multiply
    39,043.13x = 53,879.56 × 21,138.15
  4. Step 4: Simplify right side
    39,043.13x = 1,138,914,168.37
  5. Step 5: Solve for x
    x = 1,138,914,168.37/39,043.13
  6. Step 6: Final answer
    x = 29,170.67

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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.