Home / 8,970.21-12,379.41-4,991.76

Finding the Fourth Proportional to 8,970.21, 12,379.41 and 4,991.76

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Solution

The fourth proportional to 8,970.21, 12,379.41 and 4,991.76 is: 6,888.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.21 : 12,379.41 = 4,991.76 : x
  2. Step 2: Convert to fraction form
    8,970.21/12,379.41 = 4,991.76/x
  3. Step 3: Cross multiply
    8,970.21x = 12,379.41 × 4,991.76
  4. Step 4: Simplify right side
    8,970.21x = 61,795,043.66
  5. Step 5: Solve for x
    x = 61,795,043.66/8,970.21
  6. Step 6: Final answer
    x = 6,888.92

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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.