Home / 28,248-42,372-9,780

Finding the Fourth Proportional to 28,248, 42,372 and 9,780

Calculator

Solution

The fourth proportional to 28,248, 42,372 and 9,780 is: 14,670

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,248 : 42,372 = 9,780 : x
  2. Step 2: Convert to fraction form
    28,248/42,372 = 9,780/x
  3. Step 3: Cross multiply
    28,248x = 42,372 × 9,780
  4. Step 4: Simplify right side
    28,248x = 414,398,160
  5. Step 5: Solve for x
    x = 414,398,160/28,248
  6. Step 6: Final answer
    x = 14,670

Related Problems

Find fourth proportional to 14,124, 21,186 and 4,890
Half scale
Find fourth proportional to 56,496, 84,744 and 19,560
Double scale
Find fourth proportional to 28,249, 42,373.50 and 9,781
Similar ratio
Find fourth proportional to 42,372, 63,558 and 14,670
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.