Home / 39,485.39-54,490.59-21,581.15

Finding the Fourth Proportional to 39,485.39, 54,490.59 and 21,581.15

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Solution

The fourth proportional to 39,485.39, 54,490.59 and 21,581.15 is: 29,782.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,485.39 : 54,490.59 = 21,581.15 : x
  2. Step 2: Convert to fraction form
    39,485.39/54,490.59 = 21,581.15/x
  3. Step 3: Cross multiply
    39,485.39x = 54,490.59 × 21,581.15
  4. Step 4: Simplify right side
    39,485.39x = 1,175,969,323.93
  5. Step 5: Solve for x
    x = 1,175,969,323.93/39,485.39
  6. Step 6: Final answer
    x = 29,782.39

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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.