Home / 12,428.54-18,640.10-4,106.58

Finding the Fourth Proportional to 12,428.54, 18,640.10 and 4,106.58

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Solution

The fourth proportional to 12,428.54, 18,640.10 and 4,106.58 is: 6,158.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.54 : 18,640.10 = 4,106.58 : x
  2. Step 2: Convert to fraction form
    12,428.54/18,640.10 = 4,106.58/x
  3. Step 3: Cross multiply
    12,428.54x = 18,640.10 × 4,106.58
  4. Step 4: Simplify right side
    12,428.54x = 76,547,072.12
  5. Step 5: Solve for x
    x = 76,547,072.12/12,428.54
  6. Step 6: Final answer
    x = 6,158.98

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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.