Home / 15,714.64-21,686-8,641

Finding the Fourth Proportional to 15,714.64, 21,686 and 8,641

Calculator

Solution

The fourth proportional to 15,714.64, 21,686 and 8,641 is: 11,924.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,714.64 : 21,686 = 8,641 : x
  2. Step 2: Convert to fraction form
    15,714.64/21,686 = 8,641/x
  3. Step 3: Cross multiply
    15,714.64x = 21,686 × 8,641
  4. Step 4: Simplify right side
    15,714.64x = 187,388,726
  5. Step 5: Solve for x
    x = 187,388,726/15,714.64
  6. Step 6: Final answer
    x = 11,924.47

Related Problems

Find fourth proportional to 7,857.32, 10,843 and 4,320.50
Half scale
Find fourth proportional to 31,429.28, 43,372 and 17,282
Double scale
Find fourth proportional to 15,715.64, 21,687.38 and 8,642
Similar ratio
Find fourth proportional to 23,571.96, 32,529 and 12,961.50
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.