Home / 20,388-31,230

Finding the Third Proportional to 20,388 and 31,230

Calculator

Solution

The third proportional to 20,388 and 31,230 is: 47,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388 : 31,230 = 31,230 : x
  2. Step 2: Convert to fraction form
    20,388/31,230 = 31,230/x
  3. Step 3: Cross multiply
    20,388x = 31,230 × 31,230
  4. Step 4: Simplify right side
    20,388x = 975,312,900
  5. Step 5: Solve for x
    x = 975,312,900/20,388
  6. Step 6: Final answer
    x = 47,837.60

Related Problems

Find third proportional to 10,194 and 15,615
Half scale
Find third proportional to 40,776 and 62,460
Double scale
Find third proportional to 20,390 and 31,233
Similar ratio
Find third proportional to 30,582 and 46,845
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.