Home / 8,420.45-11,616.90-4,881.56

Finding the Fourth Proportional to 8,420.45, 11,616.90 and 4,881.56

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Solution

The fourth proportional to 8,420.45, 11,616.90 and 4,881.56 is: 6,734.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.45 : 11,616.90 = 4,881.56 : x
  2. Step 2: Convert to fraction form
    8,420.45/11,616.90 = 4,881.56/x
  3. Step 3: Cross multiply
    8,420.45x = 11,616.90 × 4,881.56
  4. Step 4: Simplify right side
    8,420.45x = 56,708,594.36
  5. Step 5: Solve for x
    x = 56,708,594.36/8,420.45
  6. Step 6: Final answer
    x = 6,734.63

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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.