Home / 30,688.28-42,338.94-20,084.12

Finding the Fourth Proportional to 30,688.28, 42,338.94 and 20,084.12

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Solution

The fourth proportional to 30,688.28, 42,338.94 and 20,084.12 is: 27,708.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.28 : 42,338.94 = 20,084.12 : x
  2. Step 2: Convert to fraction form
    30,688.28/42,338.94 = 20,084.12/x
  3. Step 3: Cross multiply
    30,688.28x = 42,338.94 × 20,084.12
  4. Step 4: Simplify right side
    30,688.28x = 850,340,351.63
  5. Step 5: Solve for x
    x = 850,340,351.63/30,688.28
  6. Step 6: Final answer
    x = 27,708.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.