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Finding the Fourth Proportional to 8,978.76, 13,474.29 and 3,135.35

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Solution

The fourth proportional to 8,978.76, 13,474.29 and 3,135.35 is: 4,705.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.76 : 13,474.29 = 3,135.35 : x
  2. Step 2: Convert to fraction form
    8,978.76/13,474.29 = 3,135.35/x
  3. Step 3: Cross multiply
    8,978.76x = 13,474.29 × 3,135.35
  4. Step 4: Simplify right side
    8,978.76x = 42,246,547.78
  5. Step 5: Solve for x
    x = 42,246,547.78/8,978.76
  6. Step 6: Final answer
    x = 4,705.17

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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.