Home / 10,912.10-16,368.32-3,120.90

Finding the Fourth Proportional to 10,912.10, 16,368.32 and 3,120.90

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Solution

The fourth proportional to 10,912.10, 16,368.32 and 3,120.90 is: 4,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.10 : 16,368.32 = 3,120.90 : x
  2. Step 2: Convert to fraction form
    10,912.10/16,368.32 = 3,120.90/x
  3. Step 3: Cross multiply
    10,912.10x = 16,368.32 × 3,120.90
  4. Step 4: Simplify right side
    10,912.10x = 51,083,889.89
  5. Step 5: Solve for x
    x = 51,083,889.89/10,912.10
  6. Step 6: Final answer
    x = 4,681.40

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1.5x scale

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.