Home / 12,428.16-18,639.54-4,106.21

Finding the Fourth Proportional to 12,428.16, 18,639.54 and 4,106.21

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Solution

The fourth proportional to 12,428.16, 18,639.54 and 4,106.21 is: 6,158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.16 : 18,639.54 = 4,106.21 : x
  2. Step 2: Convert to fraction form
    12,428.16/18,639.54 = 4,106.21/x
  3. Step 3: Cross multiply
    12,428.16x = 18,639.54 × 4,106.21
  4. Step 4: Simplify right side
    12,428.16x = 76,537,772.35
  5. Step 5: Solve for x
    x = 76,537,772.35/12,428.16
  6. Step 6: Final answer
    x = 6,158.42

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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.