Home / 39,139.05-58,703.07-12,840.39

Finding the Fourth Proportional to 39,139.05, 58,703.07 and 12,840.39

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Solution

The fourth proportional to 39,139.05, 58,703.07 and 12,840.39 is: 19,258.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.05 : 58,703.07 = 12,840.39 : x
  2. Step 2: Convert to fraction form
    39,139.05/58,703.07 = 12,840.39/x
  3. Step 3: Cross multiply
    39,139.05x = 58,703.07 × 12,840.39
  4. Step 4: Simplify right side
    39,139.05x = 753,770,313.00
  5. Step 5: Solve for x
    x = 753,770,313.00/39,139.05
  6. Step 6: Final answer
    x = 19,258.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.