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Finding the Fourth Proportional to 8,490, 11,717.28 and 4,764

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Solution

The fourth proportional to 8,490, 11,717.28 and 4,764 is: 6,574.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490 : 11,717.28 = 4,764 : x
  2. Step 2: Convert to fraction form
    8,490/11,717.28 = 4,764/x
  3. Step 3: Cross multiply
    8,490x = 11,717.28 × 4,764
  4. Step 4: Simplify right side
    8,490x = 55,821,121.92
  5. Step 5: Solve for x
    x = 55,821,121.92/8,490
  6. Step 6: Final answer
    x = 6,574.93

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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.