Home / 12,285.80-18,428.70-4,495.40

Finding the Fourth Proportional to 12,285.80, 18,428.70 and 4,495.40

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Solution

The fourth proportional to 12,285.80, 18,428.70 and 4,495.40 is: 6,743.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,285.80 : 18,428.70 = 4,495.40 : x
  2. Step 2: Convert to fraction form
    12,285.80/18,428.70 = 4,495.40/x
  3. Step 3: Cross multiply
    12,285.80x = 18,428.70 × 4,495.40
  4. Step 4: Simplify right side
    12,285.80x = 82,844,377.98
  5. Step 5: Solve for x
    x = 82,844,377.98/12,285.80
  6. Step 6: Final answer
    x = 6,743.10

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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.