Home / 15,503.80-21,395-8,430.16

Finding the Fourth Proportional to 15,503.80, 21,395 and 8,430.16

Calculator

Solution

The fourth proportional to 15,503.80, 21,395 and 8,430.16 is: 11,633.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.80 : 21,395 = 8,430.16 : x
  2. Step 2: Convert to fraction form
    15,503.80/21,395 = 8,430.16/x
  3. Step 3: Cross multiply
    15,503.80x = 21,395 × 8,430.16
  4. Step 4: Simplify right side
    15,503.80x = 180,363,273.20
  5. Step 5: Solve for x
    x = 180,363,273.20/15,503.80
  6. Step 6: Final answer
    x = 11,633.49

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.