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Finding the Fourth Proportional to 7,006.50, 10,509.75 and 1,812.38

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Solution

The fourth proportional to 7,006.50, 10,509.75 and 1,812.38 is: 2,718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,006.50 : 10,509.75 = 1,812.38 : x
  2. Step 2: Convert to fraction form
    7,006.50/10,509.75 = 1,812.38/x
  3. Step 3: Cross multiply
    7,006.50x = 10,509.75 × 1,812.38
  4. Step 4: Simplify right side
    7,006.50x = 19,047,608.16
  5. Step 5: Solve for x
    x = 19,047,608.16/7,006.50
  6. Step 6: Final answer
    x = 2,718.56

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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.