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Finding the Fourth Proportional to 8,490, 11,716.90 and 4,713.40

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Solution

The fourth proportional to 8,490, 11,716.90 and 4,713.40 is: 6,504.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490 : 11,716.90 = 4,713.40 : x
  2. Step 2: Convert to fraction form
    8,490/11,716.90 = 4,713.40/x
  3. Step 3: Cross multiply
    8,490x = 11,716.90 × 4,713.40
  4. Step 4: Simplify right side
    8,490x = 55,226,436.46
  5. Step 5: Solve for x
    x = 55,226,436.46/8,490
  6. Step 6: Final answer
    x = 6,504.88

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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.