Home / 28,486.45-39,285.30-21,759.58

Finding the Fourth Proportional to 28,486.45, 39,285.30 and 21,759.58

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Solution

The fourth proportional to 28,486.45, 39,285.30 and 21,759.58 is: 30,008.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.45 : 39,285.30 = 21,759.58 : x
  2. Step 2: Convert to fraction form
    28,486.45/39,285.30 = 21,759.58/x
  3. Step 3: Cross multiply
    28,486.45x = 39,285.30 × 21,759.58
  4. Step 4: Simplify right side
    28,486.45x = 854,831,628.17
  5. Step 5: Solve for x
    x = 854,831,628.17/28,486.45
  6. Step 6: Final answer
    x = 30,008.36

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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.