Home / 11,478.88-15,840-6,442.36

Finding the Fourth Proportional to 11,478.88, 15,840 and 6,442.36

Calculator

Solution

The fourth proportional to 11,478.88, 15,840 and 6,442.36 is: 8,889.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,478.88 : 15,840 = 6,442.36 : x
  2. Step 2: Convert to fraction form
    11,478.88/15,840 = 6,442.36/x
  3. Step 3: Cross multiply
    11,478.88x = 15,840 × 6,442.36
  4. Step 4: Simplify right side
    11,478.88x = 102,046,982.40
  5. Step 5: Solve for x
    x = 102,046,982.40/11,478.88
  6. Step 6: Final answer
    x = 8,889.98

Related Problems

Find fourth proportional to 5,739.44, 7,920 and 3,221.18
Half scale
Find fourth proportional to 22,957.76, 31,680 and 12,884.72
Double scale
Find fourth proportional to 11,479.88, 15,841.38 and 6,443.36
Similar ratio
Find fourth proportional to 17,218.32, 23,760 and 9,663.54
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.