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Finding the Fourth Proportional to 11,580.72, 15,989.16 and 8,887.08

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Solution

The fourth proportional to 11,580.72, 15,989.16 and 8,887.08 is: 12,270.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,580.72 : 15,989.16 = 8,887.08 : x
  2. Step 2: Convert to fraction form
    11,580.72/15,989.16 = 8,887.08/x
  3. Step 3: Cross multiply
    11,580.72x = 15,989.16 × 8,887.08
  4. Step 4: Simplify right side
    11,580.72x = 142,096,944.05
  5. Step 5: Solve for x
    x = 142,096,944.05/11,580.72
  6. Step 6: Final answer
    x = 12,270.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.