Home / 86,682-130,023-21,018

Finding the Fourth Proportional to 86,682, 130,023 and 21,018

Calculator

Solution

The fourth proportional to 86,682, 130,023 and 21,018 is: 31,527

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,682 : 130,023 = 21,018 : x
  2. Step 2: Convert to fraction form
    86,682/130,023 = 21,018/x
  3. Step 3: Cross multiply
    86,682x = 130,023 × 21,018
  4. Step 4: Simplify right side
    86,682x = 2,732,823,414
  5. Step 5: Solve for x
    x = 2,732,823,414/86,682
  6. Step 6: Final answer
    x = 31,527

Related Problems

Find fourth proportional to 43,341, 65,011.50 and 10,509
Half scale
Find fourth proportional to 173,364, 260,046 and 42,036
Double scale
Find fourth proportional to 86,683, 130,024.50 and 21,019
Similar ratio
Find fourth proportional to 130,023, 195,034.50 and 31,527
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.