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Finding the Fourth Proportional to 12,920.70, 19,362.60 and 7,362.30

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Solution

The fourth proportional to 12,920.70, 19,362.60 and 7,362.30 is: 11,032.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.70 : 19,362.60 = 7,362.30 : x
  2. Step 2: Convert to fraction form
    12,920.70/19,362.60 = 7,362.30/x
  3. Step 3: Cross multiply
    12,920.70x = 19,362.60 × 7,362.30
  4. Step 4: Simplify right side
    12,920.70x = 142,553,269.98
  5. Step 5: Solve for x
    x = 142,553,269.98/12,920.70
  6. Step 6: Final answer
    x = 11,032.94

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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.