Home / 10,664.20-15,977.10-8,705.80

Finding the Fourth Proportional to 10,664.20, 15,977.10 and 8,705.80

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Solution

The fourth proportional to 10,664.20, 15,977.10 and 8,705.80 is: 13,043.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,664.20 : 15,977.10 = 8,705.80 : x
  2. Step 2: Convert to fraction form
    10,664.20/15,977.10 = 8,705.80/x
  3. Step 3: Cross multiply
    10,664.20x = 15,977.10 × 8,705.80
  4. Step 4: Simplify right side
    10,664.20x = 139,093,437.18
  5. Step 5: Solve for x
    x = 139,093,437.18/10,664.20
  6. Step 6: Final answer
    x = 13,043.03

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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.