Home / 21,219.84-31,674-19,656

Finding the Fourth Proportional to 21,219.84, 31,674 and 19,656

Calculator

Solution

The fourth proportional to 21,219.84, 31,674 and 19,656 is: 29,339.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.84 : 31,674 = 19,656 : x
  2. Step 2: Convert to fraction form
    21,219.84/31,674 = 19,656/x
  3. Step 3: Cross multiply
    21,219.84x = 31,674 × 19,656
  4. Step 4: Simplify right side
    21,219.84x = 622,584,144
  5. Step 5: Solve for x
    x = 622,584,144/21,219.84
  6. Step 6: Final answer
    x = 29,339.72

Related Problems

Find fourth proportional to 10,609.92, 15,837 and 9,828
Half scale
Find fourth proportional to 42,439.68, 63,348 and 39,312
Double scale
Find fourth proportional to 21,220.84, 31,675.49 and 19,657
Similar ratio
Find fourth proportional to 31,829.76, 47,511 and 29,484
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.