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Finding the Fourth Proportional to 8,666.64, 11,958.15 and 5,310.21

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Solution

The fourth proportional to 8,666.64, 11,958.15 and 5,310.21 is: 7,326.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.64 : 11,958.15 = 5,310.21 : x
  2. Step 2: Convert to fraction form
    8,666.64/11,958.15 = 5,310.21/x
  3. Step 3: Cross multiply
    8,666.64x = 11,958.15 × 5,310.21
  4. Step 4: Simplify right side
    8,666.64x = 63,500,287.71
  5. Step 5: Solve for x
    x = 63,500,287.71/8,666.64
  6. Step 6: Final answer
    x = 7,326.98

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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.