Home / 39,459.78-54,454.29-21,554.58

Finding the Fourth Proportional to 39,459.78, 54,454.29 and 21,554.58

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Solution

The fourth proportional to 39,459.78, 54,454.29 and 21,554.58 is: 29,745.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,459.78 : 54,454.29 = 21,554.58 : x
  2. Step 2: Convert to fraction form
    39,459.78/54,454.29 = 21,554.58/x
  3. Step 3: Cross multiply
    39,459.78x = 54,454.29 × 21,554.58
  4. Step 4: Simplify right side
    39,459.78x = 1,173,739,350.15
  5. Step 5: Solve for x
    x = 1,173,739,350.15/39,459.78
  6. Step 6: Final answer
    x = 29,745.21

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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.