Home / 21,144-31,716-8,832

Finding the Fourth Proportional to 21,144, 31,716 and 8,832

Calculator

Solution

The fourth proportional to 21,144, 31,716 and 8,832 is: 13,248

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144 : 31,716 = 8,832 : x
  2. Step 2: Convert to fraction form
    21,144/31,716 = 8,832/x
  3. Step 3: Cross multiply
    21,144x = 31,716 × 8,832
  4. Step 4: Simplify right side
    21,144x = 280,115,712
  5. Step 5: Solve for x
    x = 280,115,712/21,144
  6. Step 6: Final answer
    x = 13,248

Related Problems

Find fourth proportional to 10,572, 15,858 and 4,416
Half scale
Find fourth proportional to 42,288, 63,432 and 17,664
Double scale
Find fourth proportional to 21,145, 31,717.50 and 8,833
Similar ratio
Find fourth proportional to 31,716, 47,574 and 13,248
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.