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Finding the Fourth Proportional to 7,563.78, 11,316.51 and 7,218.72

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Solution

The fourth proportional to 7,563.78, 11,316.51 and 7,218.72 is: 10,800.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,563.78 : 11,316.51 = 7,218.72 : x
  2. Step 2: Convert to fraction form
    7,563.78/11,316.51 = 7,218.72/x
  3. Step 3: Cross multiply
    7,563.78x = 11,316.51 × 7,218.72
  4. Step 4: Simplify right side
    7,563.78x = 81,690,717.07
  5. Step 5: Solve for x
    x = 81,690,717.07/7,563.78
  6. Step 6: Final answer
    x = 10,800.25

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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.