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Finding the Fourth Proportional to 7,887.86, 10,881.80 and 5,195.60

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Solution

The fourth proportional to 7,887.86, 10,881.80 and 5,195.60 is: 7,167.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.86 : 10,881.80 = 5,195.60 : x
  2. Step 2: Convert to fraction form
    7,887.86/10,881.80 = 5,195.60/x
  3. Step 3: Cross multiply
    7,887.86x = 10,881.80 × 5,195.60
  4. Step 4: Simplify right side
    7,887.86x = 56,537,480.08
  5. Step 5: Solve for x
    x = 56,537,480.08/7,887.86
  6. Step 6: Final answer
    x = 7,167.66

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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.