Home / 15,700-19,902

Finding the Third Proportional to 15,700 and 19,902

Calculator

Solution

The third proportional to 15,700 and 19,902 is: 25,228.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,700 : 19,902 = 19,902 : x
  2. Step 2: Convert to fraction form
    15,700/19,902 = 19,902/x
  3. Step 3: Cross multiply
    15,700x = 19,902 × 19,902
  4. Step 4: Simplify right side
    15,700x = 396,089,604
  5. Step 5: Solve for x
    x = 396,089,604/15,700
  6. Step 6: Final answer
    x = 25,228.64

Related Problems

Find third proportional to 7,850 and 9,951
Half scale
Find third proportional to 31,400 and 39,804
Double scale
Find third proportional to 15,702 and 19,905
Similar ratio
Find third proportional to 23,550 and 29,853
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.