Home / 15,666-21,621-9,042

Finding the Fourth Proportional to 15,666, 21,621 and 9,042

Calculator

Solution

The fourth proportional to 15,666, 21,621 and 9,042 is: 12,479.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666 : 21,621 = 9,042 : x
  2. Step 2: Convert to fraction form
    15,666/21,621 = 9,042/x
  3. Step 3: Cross multiply
    15,666x = 21,621 × 9,042
  4. Step 4: Simplify right side
    15,666x = 195,497,082
  5. Step 5: Solve for x
    x = 195,497,082/15,666
  6. Step 6: Final answer
    x = 12,479.07

Related Problems

Find fourth proportional to 7,833, 10,810.50 and 4,521
Half scale
Find fourth proportional to 31,332, 43,242 and 18,084
Double scale
Find fourth proportional to 15,667, 21,622.38 and 9,043
Similar ratio
Find fourth proportional to 23,499, 32,431.50 and 13,563
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.