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Finding the Fourth Proportional to 7,887.78, 11,811.18 and 7,654.08

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Solution

The fourth proportional to 7,887.78, 11,811.18 and 7,654.08 is: 11,461.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.78 : 11,811.18 = 7,654.08 : x
  2. Step 2: Convert to fraction form
    7,887.78/11,811.18 = 7,654.08/x
  3. Step 3: Cross multiply
    7,887.78x = 11,811.18 × 7,654.08
  4. Step 4: Simplify right side
    7,887.78x = 90,403,716.61
  5. Step 5: Solve for x
    x = 90,403,716.61/7,887.78
  6. Step 6: Final answer
    x = 11,461.24

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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.