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Finding the Fourth Proportional to 8,887.80, 12,270.36 and 7,903.56

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Solution

The fourth proportional to 8,887.80, 12,270.36 and 7,903.56 is: 10,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,887.80 : 12,270.36 = 7,903.56 : x
  2. Step 2: Convert to fraction form
    8,887.80/12,270.36 = 7,903.56/x
  3. Step 3: Cross multiply
    8,887.80x = 12,270.36 × 7,903.56
  4. Step 4: Simplify right side
    8,887.80x = 96,979,526.48
  5. Step 5: Solve for x
    x = 96,979,526.48/8,887.80
  6. Step 6: Final answer
    x = 10,911.53

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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.