Home / 8,615.05-11,887.34-5,077.78

Finding the Fourth Proportional to 8,615.05, 11,887.34 and 5,077.78

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Solution

The fourth proportional to 8,615.05, 11,887.34 and 5,077.78 is: 7,006.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.05 : 11,887.34 = 5,077.78 : x
  2. Step 2: Convert to fraction form
    8,615.05/11,887.34 = 5,077.78/x
  3. Step 3: Cross multiply
    8,615.05x = 11,887.34 × 5,077.78
  4. Step 4: Simplify right side
    8,615.05x = 60,361,242.20
  5. Step 5: Solve for x
    x = 60,361,242.20/8,615.05
  6. Step 6: Final answer
    x = 7,006.49

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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.