Home / 4,155-8,787

Finding the Third Proportional to 4,155 and 8,787

Calculator

Solution

The third proportional to 4,155 and 8,787 is: 18,582.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,155 : 8,787 = 8,787 : x
  2. Step 2: Convert to fraction form
    4,155/8,787 = 8,787/x
  3. Step 3: Cross multiply
    4,155x = 8,787 × 8,787
  4. Step 4: Simplify right side
    4,155x = 77,211,369
  5. Step 5: Solve for x
    x = 77,211,369/4,155
  6. Step 6: Final answer
    x = 18,582.76

Related Problems

Find third proportional to 2,077.50 and 4,393.50
Half scale
Find third proportional to 8,310 and 17,574
Double scale
Find third proportional to 4,157 and 8,791
Similar ratio
Find third proportional to 6,232.50 and 13,180.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.