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Finding the Fourth Proportional to 20,030.81, 30,039.98 and 6,880.05

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Solution

The fourth proportional to 20,030.81, 30,039.98 and 6,880.05 is: 10,317.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,030.81 : 30,039.98 = 6,880.05 : x
  2. Step 2: Convert to fraction form
    20,030.81/30,039.98 = 6,880.05/x
  3. Step 3: Cross multiply
    20,030.81x = 30,039.98 × 6,880.05
  4. Step 4: Simplify right side
    20,030.81x = 206,676,530.00
  5. Step 5: Solve for x
    x = 206,676,530.00/20,030.81
  6. Step 6: Final answer
    x = 10,317.93

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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.