Home / 39,603.90-54,653.40-21,699.60

Finding the Fourth Proportional to 39,603.90, 54,653.40 and 21,699.60

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Solution

The fourth proportional to 39,603.90, 54,653.40 and 21,699.60 is: 29,945.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,603.90 : 54,653.40 = 21,699.60 : x
  2. Step 2: Convert to fraction form
    39,603.90/54,653.40 = 21,699.60/x
  3. Step 3: Cross multiply
    39,603.90x = 54,653.40 × 21,699.60
  4. Step 4: Simplify right side
    39,603.90x = 1,185,956,918.64
  5. Step 5: Solve for x
    x = 1,185,956,918.64/39,603.90
  6. Step 6: Final answer
    x = 29,945.46

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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.