Home / 15,588-21,430

Finding the Third Proportional to 15,588 and 21,430

Calculator

Solution

The third proportional to 15,588 and 21,430 is: 29,461.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,588 : 21,430 = 21,430 : x
  2. Step 2: Convert to fraction form
    15,588/21,430 = 21,430/x
  3. Step 3: Cross multiply
    15,588x = 21,430 × 21,430
  4. Step 4: Simplify right side
    15,588x = 459,244,900
  5. Step 5: Solve for x
    x = 459,244,900/15,588
  6. Step 6: Final answer
    x = 29,461.44

Related Problems

Find third proportional to 7,794 and 10,715
Half scale
Find third proportional to 31,176 and 42,860
Double scale
Find third proportional to 15,590 and 21,433
Similar ratio
Find third proportional to 23,382 and 32,145
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.