Home / 39,036.43-53,870.21-21,131.43

Finding the Fourth Proportional to 39,036.43, 53,870.21 and 21,131.43

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Solution

The fourth proportional to 39,036.43, 53,870.21 and 21,131.43 is: 29,161.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,036.43 : 53,870.21 = 21,131.43 : x
  2. Step 2: Convert to fraction form
    39,036.43/53,870.21 = 21,131.43/x
  3. Step 3: Cross multiply
    39,036.43x = 53,870.21 × 21,131.43
  4. Step 4: Simplify right side
    39,036.43x = 1,138,354,765.16
  5. Step 5: Solve for x
    x = 1,138,354,765.16/39,036.43
  6. Step 6: Final answer
    x = 29,161.34

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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.