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Finding the Fourth Proportional to 8,999.36, 13,490.78 and 3,152.78

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Solution

The fourth proportional to 8,999.36, 13,490.78 and 3,152.78 is: 4,726.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.36 : 13,490.78 = 3,152.78 : x
  2. Step 2: Convert to fraction form
    8,999.36/13,490.78 = 3,152.78/x
  3. Step 3: Cross multiply
    8,999.36x = 13,490.78 × 3,152.78
  4. Step 4: Simplify right side
    8,999.36x = 42,533,378.15
  5. Step 5: Solve for x
    x = 42,533,378.15/8,999.36
  6. Step 6: Final answer
    x = 4,726.27

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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.