Home / 4,778-8,139

Finding the Third Proportional to 4,778 and 8,139

Calculator

Solution

The third proportional to 4,778 and 8,139 is: 13,864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,778 : 8,139 = 8,139 : x
  2. Step 2: Convert to fraction form
    4,778/8,139 = 8,139/x
  3. Step 3: Cross multiply
    4,778x = 8,139 × 8,139
  4. Step 4: Simplify right side
    4,778x = 66,243,321
  5. Step 5: Solve for x
    x = 66,243,321/4,778
  6. Step 6: Final answer
    x = 13,864.24

Related Problems

Find third proportional to 2,389 and 4,069.50
Half scale
Find third proportional to 9,556 and 16,278
Double scale
Find third proportional to 4,780 and 8,142
Similar ratio
Find third proportional to 7,167 and 12,208.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.