Home / 20,683.80-31,025.70-12,810.60

Finding the Fourth Proportional to 20,683.80, 31,025.70 and 12,810.60

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Solution

The fourth proportional to 20,683.80, 31,025.70 and 12,810.60 is: 19,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.80 : 31,025.70 = 12,810.60 : x
  2. Step 2: Convert to fraction form
    20,683.80/31,025.70 = 12,810.60/x
  3. Step 3: Cross multiply
    20,683.80x = 31,025.70 × 12,810.60
  4. Step 4: Simplify right side
    20,683.80x = 397,457,832.42
  5. Step 5: Solve for x
    x = 397,457,832.42/20,683.80
  6. Step 6: Final answer
    x = 19,215.90

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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.