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Finding the Fourth Proportional to 8,756.65, 13,135.80 and 3,490.39

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Solution

The fourth proportional to 8,756.65, 13,135.80 and 3,490.39 is: 5,235.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.65 : 13,135.80 = 3,490.39 : x
  2. Step 2: Convert to fraction form
    8,756.65/13,135.80 = 3,490.39/x
  3. Step 3: Cross multiply
    8,756.65x = 13,135.80 × 3,490.39
  4. Step 4: Simplify right side
    8,756.65x = 45,849,064.96
  5. Step 5: Solve for x
    x = 45,849,064.96/8,756.65
  6. Step 6: Final answer
    x = 5,235.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.