Home / 15,172.86-20,936-8,457

Finding the Fourth Proportional to 15,172.86, 20,936 and 8,457

Calculator

Solution

The fourth proportional to 15,172.86, 20,936 and 8,457 is: 11,669.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172.86 : 20,936 = 8,457 : x
  2. Step 2: Convert to fraction form
    15,172.86/20,936 = 8,457/x
  3. Step 3: Cross multiply
    15,172.86x = 20,936 × 8,457
  4. Step 4: Simplify right side
    15,172.86x = 177,055,752
  5. Step 5: Solve for x
    x = 177,055,752/15,172.86
  6. Step 6: Final answer
    x = 11,669.24

Related Problems

Find fourth proportional to 7,586.43, 10,468 and 4,228.50
Half scale
Find fourth proportional to 30,345.72, 41,872 and 16,914
Double scale
Find fourth proportional to 15,173.86, 20,937.38 and 8,458
Similar ratio
Find fourth proportional to 22,759.29, 31,404 and 12,685.50
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.