Home / 39,787.11-54,906.58-21,638

Finding the Fourth Proportional to 39,787.11, 54,906.58 and 21,638

Calculator

Solution

The fourth proportional to 39,787.11, 54,906.58 and 21,638 is: 29,860.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,787.11 : 54,906.58 = 21,638 : x
  2. Step 2: Convert to fraction form
    39,787.11/54,906.58 = 21,638/x
  3. Step 3: Cross multiply
    39,787.11x = 54,906.58 × 21,638
  4. Step 4: Simplify right side
    39,787.11x = 1,188,068,578.04
  5. Step 5: Solve for x
    x = 1,188,068,578.04/39,787.11
  6. Step 6: Final answer
    x = 29,860.64

Related Problems

Find fourth proportional to 19,893.56, 27,453.29 and 10,819
Half scale
Find fourth proportional to 79,574.22, 109,813.16 and 43,276
Double scale
Find fourth proportional to 39,788.11, 54,907.96 and 21,639
Similar ratio
Find fourth proportional to 59,680.67, 82,359.87 and 32,457
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.