Home / 39,866.85-55,016.42-21,961.53

Finding the Fourth Proportional to 39,866.85, 55,016.42 and 21,961.53

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Solution

The fourth proportional to 39,866.85, 55,016.42 and 21,961.53 is: 30,307.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,866.85 : 55,016.42 = 21,961.53 : x
  2. Step 2: Convert to fraction form
    39,866.85/55,016.42 = 21,961.53/x
  3. Step 3: Cross multiply
    39,866.85x = 55,016.42 × 21,961.53
  4. Step 4: Simplify right side
    39,866.85x = 1,208,244,648.51
  5. Step 5: Solve for x
    x = 1,208,244,648.51/39,866.85
  6. Step 6: Final answer
    x = 30,307.00

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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.