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Finding the Fourth Proportional to 8,628.70, 11,911.62 and 6,505.10

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Solution

The fourth proportional to 8,628.70, 11,911.62 and 6,505.10 is: 8,980.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.70 : 11,911.62 = 6,505.10 : x
  2. Step 2: Convert to fraction form
    8,628.70/11,911.62 = 6,505.10/x
  3. Step 3: Cross multiply
    8,628.70x = 11,911.62 × 6,505.10
  4. Step 4: Simplify right side
    8,628.70x = 77,486,187.18
  5. Step 5: Solve for x
    x = 77,486,187.18/8,628.70
  6. Step 6: Final answer
    x = 8,980.05

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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.