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Finding the Fourth Proportional to 7,887.45, 11,810.94 and 7,653.87

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Solution

The fourth proportional to 7,887.45, 11,810.94 and 7,653.87 is: 11,461.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.45 : 11,810.94 = 7,653.87 : x
  2. Step 2: Convert to fraction form
    7,887.45/11,810.94 = 7,653.87/x
  3. Step 3: Cross multiply
    7,887.45x = 11,810.94 × 7,653.87
  4. Step 4: Simplify right side
    7,887.45x = 90,399,399.34
  5. Step 5: Solve for x
    x = 90,399,399.34/7,887.45
  6. Step 6: Final answer
    x = 11,461.17

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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.