Home / 30,689.28-42,370.56-21,254.40

Finding the Fourth Proportional to 30,689.28, 42,370.56 and 21,254.40

Calculator

Solution

The fourth proportional to 30,689.28, 42,370.56 and 21,254.40 is: 29,344.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.28 : 42,370.56 = 21,254.40 : x
  2. Step 2: Convert to fraction form
    30,689.28/42,370.56 = 21,254.40/x
  3. Step 3: Cross multiply
    30,689.28x = 42,370.56 × 21,254.40
  4. Step 4: Simplify right side
    30,689.28x = 900,560,830.46
  5. Step 5: Solve for x
    x = 900,560,830.46/30,689.28
  6. Step 6: Final answer
    x = 29,344.48

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.