Home / 13,558.35-18,718-9,105.75

Finding the Fourth Proportional to 13,558.35, 18,718 and 9,105.75

Calculator

Solution

The fourth proportional to 13,558.35, 18,718 and 9,105.75 is: 12,570.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.35 : 18,718 = 9,105.75 : x
  2. Step 2: Convert to fraction form
    13,558.35/18,718 = 9,105.75/x
  3. Step 3: Cross multiply
    13,558.35x = 18,718 × 9,105.75
  4. Step 4: Simplify right side
    13,558.35x = 170,441,428.50
  5. Step 5: Solve for x
    x = 170,441,428.50/13,558.35
  6. Step 6: Final answer
    x = 12,570.96

Related Problems

Find fourth proportional to 6,779.18, 9,359 and 4,552.88
Half scale
Find fourth proportional to 27,116.70, 37,436 and 18,211.50
Double scale
Find fourth proportional to 13,559.35, 18,719.38 and 9,106.75
Similar ratio
Find fourth proportional to 20,337.53, 28,077 and 13,658.63
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.