Home / 28,290-42,435-9,822

Finding the Fourth Proportional to 28,290, 42,435 and 9,822

Calculator

Solution

The fourth proportional to 28,290, 42,435 and 9,822 is: 14,733

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290 : 42,435 = 9,822 : x
  2. Step 2: Convert to fraction form
    28,290/42,435 = 9,822/x
  3. Step 3: Cross multiply
    28,290x = 42,435 × 9,822
  4. Step 4: Simplify right side
    28,290x = 416,796,570
  5. Step 5: Solve for x
    x = 416,796,570/28,290
  6. Step 6: Final answer
    x = 14,733

Related Problems

Find fourth proportional to 14,145, 21,217.50 and 4,911
Half scale
Find fourth proportional to 56,580, 84,870 and 19,644
Double scale
Find fourth proportional to 28,291, 42,436.50 and 9,823
Similar ratio
Find fourth proportional to 42,435, 63,652.50 and 14,733
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.