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Finding the Fourth Proportional to 30,485.99, 42,068.99 and 16,873.45

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Solution

The fourth proportional to 30,485.99, 42,068.99 and 16,873.45 is: 23,284.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,485.99 : 42,068.99 = 16,873.45 : x
  2. Step 2: Convert to fraction form
    30,485.99/42,068.99 = 16,873.45/x
  3. Step 3: Cross multiply
    30,485.99x = 42,068.99 × 16,873.45
  4. Step 4: Simplify right side
    30,485.99x = 709,848,936.33
  5. Step 5: Solve for x
    x = 709,848,936.33/30,485.99
  6. Step 6: Final answer
    x = 23,284.43

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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.