Home / 5,410-8,115-1,306

Finding the Fourth Proportional to 5,410, 8,115 and 1,306

Calculator

Solution

The fourth proportional to 5,410, 8,115 and 1,306 is: 1,959

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,410 : 8,115 = 1,306 : x
  2. Step 2: Convert to fraction form
    5,410/8,115 = 1,306/x
  3. Step 3: Cross multiply
    5,410x = 8,115 × 1,306
  4. Step 4: Simplify right side
    5,410x = 10,598,190
  5. Step 5: Solve for x
    x = 10,598,190/5,410
  6. Step 6: Final answer
    x = 1,959

Related Problems

Find fourth proportional to 2,705, 4,057.50 and 653
Half scale
Find fourth proportional to 10,820, 16,230 and 2,612
Double scale
Find fourth proportional to 5,411, 8,116.50 and 1,307
Similar ratio
Find fourth proportional to 8,115, 12,172.50 and 1,959
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.