Home / 10,385.35-15,580.41-2,989.87

Finding the Fourth Proportional to 10,385.35, 15,580.41 and 2,989.87

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Solution

The fourth proportional to 10,385.35, 15,580.41 and 2,989.87 is: 4,485.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,385.35 : 15,580.41 = 2,989.87 : x
  2. Step 2: Convert to fraction form
    10,385.35/15,580.41 = 2,989.87/x
  3. Step 3: Cross multiply
    10,385.35x = 15,580.41 × 2,989.87
  4. Step 4: Simplify right side
    10,385.35x = 46,583,400.45
  5. Step 5: Solve for x
    x = 46,583,400.45/10,385.35
  6. Step 6: Final answer
    x = 4,485.49

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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.