Home / 28,669.21-42,962.13-12,639.24

Finding the Fourth Proportional to 28,669.21, 42,962.13 and 12,639.24

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Solution

The fourth proportional to 28,669.21, 42,962.13 and 12,639.24 is: 18,940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,669.21 : 42,962.13 = 12,639.24 : x
  2. Step 2: Convert to fraction form
    28,669.21/42,962.13 = 12,639.24/x
  3. Step 3: Cross multiply
    28,669.21x = 42,962.13 × 12,639.24
  4. Step 4: Simplify right side
    28,669.21x = 543,008,671.98
  5. Step 5: Solve for x
    x = 543,008,671.98/28,669.21
  6. Step 6: Final answer
    x = 18,940.48

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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.