Home / 19,979.36-29,968.32-6,128

Finding the Fourth Proportional to 19,979.36, 29,968.32 and 6,128

Calculator

Solution

The fourth proportional to 19,979.36, 29,968.32 and 6,128 is: 9,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,979.36 : 29,968.32 = 6,128 : x
  2. Step 2: Convert to fraction form
    19,979.36/29,968.32 = 6,128/x
  3. Step 3: Cross multiply
    19,979.36x = 29,968.32 × 6,128
  4. Step 4: Simplify right side
    19,979.36x = 183,645,864.96
  5. Step 5: Solve for x
    x = 183,645,864.96/19,979.36
  6. Step 6: Final answer
    x = 9,191.78

Related Problems

Find fourth proportional to 9,989.68, 14,984.16 and 3,064
Half scale
Find fourth proportional to 39,958.72, 59,936.64 and 12,256
Double scale
Find fourth proportional to 19,980.36, 29,969.82 and 6,129
Similar ratio
Find fourth proportional to 29,969.04, 44,952.48 and 9,192
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.