Home / 39,218.39-54,121.73-21,313.40

Finding the Fourth Proportional to 39,218.39, 54,121.73 and 21,313.40

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Solution

The fourth proportional to 39,218.39, 54,121.73 and 21,313.40 is: 29,412.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,218.39 : 54,121.73 = 21,313.40 : x
  2. Step 2: Convert to fraction form
    39,218.39/54,121.73 = 21,313.40/x
  3. Step 3: Cross multiply
    39,218.39x = 54,121.73 × 21,313.40
  4. Step 4: Simplify right side
    39,218.39x = 1,153,517,703.01
  5. Step 5: Solve for x
    x = 1,153,517,703.01/39,218.39
  6. Step 6: Final answer
    x = 29,412.67

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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.