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Finding the Fourth Proportional to 7,289.70, 10,907.55 and 5,345.70

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Solution

The fourth proportional to 7,289.70, 10,907.55 and 5,345.70 is: 7,998.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,289.70 : 10,907.55 = 5,345.70 : x
  2. Step 2: Convert to fraction form
    7,289.70/10,907.55 = 5,345.70/x
  3. Step 3: Cross multiply
    7,289.70x = 10,907.55 × 5,345.70
  4. Step 4: Simplify right side
    7,289.70x = 58,308,490.04
  5. Step 5: Solve for x
    x = 58,308,490.04/7,289.70
  6. Step 6: Final answer
    x = 7,998.75

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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.