Home / 8,985-12,399.30-5,259

Finding the Fourth Proportional to 8,985, 12,399.30 and 5,259

Calculator

Solution

The fourth proportional to 8,985, 12,399.30 and 5,259 is: 7,257.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985 : 12,399.30 = 5,259 : x
  2. Step 2: Convert to fraction form
    8,985/12,399.30 = 5,259/x
  3. Step 3: Cross multiply
    8,985x = 12,399.30 × 5,259
  4. Step 4: Simplify right side
    8,985x = 65,207,918.70
  5. Step 5: Solve for x
    x = 65,207,918.70/8,985
  6. Step 6: Final answer
    x = 7,257.42

Related Problems

Find fourth proportional to 4,492.50, 6,199.65 and 2,629.50
Half scale
Find fourth proportional to 17,970, 24,798.60 and 10,518
Double scale
Find fourth proportional to 8,986, 12,400.68 and 5,260
Similar ratio
Find fourth proportional to 13,477.50, 18,598.95 and 7,888.50
1.5x scale

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.