Home / 20,787-45,128

Finding the Third Proportional to 20,787 and 45,128

Calculator

Solution

The third proportional to 20,787 and 45,128 is: 97,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787 : 45,128 = 45,128 : x
  2. Step 2: Convert to fraction form
    20,787/45,128 = 45,128/x
  3. Step 3: Cross multiply
    20,787x = 45,128 × 45,128
  4. Step 4: Simplify right side
    20,787x = 2,036,536,384
  5. Step 5: Solve for x
    x = 2,036,536,384/20,787
  6. Step 6: Final answer
    x = 97,971.64

Related Problems

Find third proportional to 10,393.50 and 22,564
Half scale
Find third proportional to 41,574 and 90,256
Double scale
Find third proportional to 20,789 and 45,132
Similar ratio
Find third proportional to 31,180.50 and 67,692
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.