Home / 5,280-7,920-1,632

Finding the Fourth Proportional to 5,280, 7,920 and 1,632

Calculator

Solution

The fourth proportional to 5,280, 7,920 and 1,632 is: 2,448

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280 : 7,920 = 1,632 : x
  2. Step 2: Convert to fraction form
    5,280/7,920 = 1,632/x
  3. Step 3: Cross multiply
    5,280x = 7,920 × 1,632
  4. Step 4: Simplify right side
    5,280x = 12,925,440
  5. Step 5: Solve for x
    x = 12,925,440/5,280
  6. Step 6: Final answer
    x = 2,448

Related Problems

Find fourth proportional to 2,640, 3,960 and 816
Half scale
Find fourth proportional to 10,560, 15,840 and 3,264
Double scale
Find fourth proportional to 5,281, 7,921.50 and 1,633
Similar ratio
Find fourth proportional to 7,920, 11,880 and 2,448
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.