Home / 21,889.04-30,206.84-12,939.77

Finding the Fourth Proportional to 21,889.04, 30,206.84 and 12,939.77

Calculator

Solution

The fourth proportional to 21,889.04, 30,206.84 and 12,939.77 is: 17,856.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,889.04 : 30,206.84 = 12,939.77 : x
  2. Step 2: Convert to fraction form
    21,889.04/30,206.84 = 12,939.77/x
  3. Step 3: Cross multiply
    21,889.04x = 30,206.84 × 12,939.77
  4. Step 4: Simplify right side
    21,889.04x = 390,869,443.34
  5. Step 5: Solve for x
    x = 390,869,443.34/21,889.04
  6. Step 6: Final answer
    x = 17,856.86

Related Problems

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.