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Finding the Fourth Proportional to 8,978.77, 13,455.67 and 4,586.95

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Solution

The fourth proportional to 8,978.77, 13,455.67 and 4,586.95 is: 6,874.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.77 : 13,455.67 = 4,586.95 : x
  2. Step 2: Convert to fraction form
    8,978.77/13,455.67 = 4,586.95/x
  3. Step 3: Cross multiply
    8,978.77x = 13,455.67 × 4,586.95
  4. Step 4: Simplify right side
    8,978.77x = 61,720,485.51
  5. Step 5: Solve for x
    x = 61,720,485.51/8,978.77
  6. Step 6: Final answer
    x = 6,874.05

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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.