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Finding the Fourth Proportional to 8,642.58, 11,918.88 and 6,410.10

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Solution

The fourth proportional to 8,642.58, 11,918.88 and 6,410.10 is: 8,840.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.58 : 11,918.88 = 6,410.10 : x
  2. Step 2: Convert to fraction form
    8,642.58/11,918.88 = 6,410.10/x
  3. Step 3: Cross multiply
    8,642.58x = 11,918.88 × 6,410.10
  4. Step 4: Simplify right side
    8,642.58x = 76,401,212.69
  5. Step 5: Solve for x
    x = 76,401,212.69/8,642.58
  6. Step 6: Final answer
    x = 8,840.09

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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.