Home / 6,640.80-8,991-6,640.80

Finding the Fourth Proportional to 6,640.80, 8,991 and 6,640.80

Calculator

Solution

The fourth proportional to 6,640.80, 8,991 and 6,640.80 is: 8,991

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.80 : 8,991 = 6,640.80 : x
  2. Step 2: Convert to fraction form
    6,640.80/8,991 = 6,640.80/x
  3. Step 3: Cross multiply
    6,640.80x = 8,991 × 6,640.80
  4. Step 4: Simplify right side
    6,640.80x = 59,707,432.80
  5. Step 5: Solve for x
    x = 59,707,432.80/6,640.80
  6. Step 6: Final answer
    x = 8,991

Related Problems

Find fourth proportional to 3,320.40, 4,495.50 and 3,320.40
Half scale
Find fourth proportional to 13,281.60, 17,982 and 13,281.60
Double scale
Find fourth proportional to 6,641.80, 8,992.35 and 6,641.80
Similar ratio
Find fourth proportional to 9,961.20, 13,486.50 and 9,961.20
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.