Home / 47,520-71,280-14,688

Finding the Fourth Proportional to 47,520, 71,280 and 14,688

Calculator

Solution

The fourth proportional to 47,520, 71,280 and 14,688 is: 22,032

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,520 : 71,280 = 14,688 : x
  2. Step 2: Convert to fraction form
    47,520/71,280 = 14,688/x
  3. Step 3: Cross multiply
    47,520x = 71,280 × 14,688
  4. Step 4: Simplify right side
    47,520x = 1,046,960,640
  5. Step 5: Solve for x
    x = 1,046,960,640/47,520
  6. Step 6: Final answer
    x = 22,032

Related Problems

Find fourth proportional to 23,760, 35,640 and 7,344
Half scale
Find fourth proportional to 95,040, 142,560 and 29,376
Double scale
Find fourth proportional to 47,521, 71,281.50 and 14,689
Similar ratio
Find fourth proportional to 71,280, 106,920 and 22,032
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.