Home / 39,218.76-54,121.64-22,455

Finding the Fourth Proportional to 39,218.76, 54,121.64 and 22,455

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Solution

The fourth proportional to 39,218.76, 54,121.64 and 22,455 is: 30,987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,218.76 : 54,121.64 = 22,455 : x
  2. Step 2: Convert to fraction form
    39,218.76/54,121.64 = 22,455/x
  3. Step 3: Cross multiply
    39,218.76x = 54,121.64 × 22,455
  4. Step 4: Simplify right side
    39,218.76x = 1,215,301,313.93
  5. Step 5: Solve for x
    x = 1,215,301,313.93/39,218.76
  6. Step 6: Final answer
    x = 30,987.75

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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.