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Finding the Fourth Proportional to 18,902.73, 28,355.46 and 7,810.08

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Solution

The fourth proportional to 18,902.73, 28,355.46 and 7,810.08 is: 11,715.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902.73 : 28,355.46 = 7,810.08 : x
  2. Step 2: Convert to fraction form
    18,902.73/28,355.46 = 7,810.08/x
  3. Step 3: Cross multiply
    18,902.73x = 28,355.46 × 7,810.08
  4. Step 4: Simplify right side
    18,902.73x = 221,458,411.04
  5. Step 5: Solve for x
    x = 221,458,411.04/18,902.73
  6. Step 6: Final answer
    x = 11,715.68

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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.