Home / 20,850.42-31,280.59-6,810.56

Finding the Fourth Proportional to 20,850.42, 31,280.59 and 6,810.56

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Solution

The fourth proportional to 20,850.42, 31,280.59 and 6,810.56 is: 10,217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.42 : 31,280.59 = 6,810.56 : x
  2. Step 2: Convert to fraction form
    20,850.42/31,280.59 = 6,810.56/x
  3. Step 3: Cross multiply
    20,850.42x = 31,280.59 × 6,810.56
  4. Step 4: Simplify right side
    20,850.42x = 213,038,178.63
  5. Step 5: Solve for x
    x = 213,038,178.63/20,850.42
  6. Step 6: Final answer
    x = 10,217.45

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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.