Home / 29.90-47.70

Finding the Third Proportional to 29.90 and 47.70

Calculator

Solution

The third proportional to 29.90 and 47.70 is: 76.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.90 : 47.70 = 47.70 : x
  2. Step 2: Convert to fraction form
    29.90/47.70 = 47.70/x
  3. Step 3: Cross multiply
    29.90x = 47.70 × 47.70
  4. Step 4: Simplify right side
    29.90x = 2,275.12
  5. Step 5: Solve for x
    x = 2,275.12/29.90
  6. Step 6: Final answer
    x = 76.09

Related Problems

Find third proportional to 14.95 and 23.85
Half scale
Find third proportional to 59.80 and 95.40
Double scale
Find third proportional to 32 and 51
Similar ratio
Find third proportional to 44.85 and 71.55
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.