Home / 18,279-27,418.65-4,428

Finding the Fourth Proportional to 18,279, 27,418.65 and 4,428

Calculator

Solution

The fourth proportional to 18,279, 27,418.65 and 4,428 is: 6,642.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,279 : 27,418.65 = 4,428 : x
  2. Step 2: Convert to fraction form
    18,279/27,418.65 = 4,428/x
  3. Step 3: Cross multiply
    18,279x = 27,418.65 × 4,428
  4. Step 4: Simplify right side
    18,279x = 121,409,782.20
  5. Step 5: Solve for x
    x = 121,409,782.20/18,279
  6. Step 6: Final answer
    x = 6,642.04

Related Problems

Find fourth proportional to 9,139.50, 13,709.33 and 2,214
Half scale
Find fourth proportional to 36,558, 54,837.30 and 8,856
Double scale
Find fourth proportional to 18,280, 27,420.15 and 4,429
Similar ratio
Find fourth proportional to 27,418.50, 41,127.98 and 6,642
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.