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Finding the Fourth Proportional to 46,990.40, 70,469.21 and 18,903.17

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Solution

The fourth proportional to 46,990.40, 70,469.21 and 18,903.17 is: 28,348.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,990.40 : 70,469.21 = 18,903.17 : x
  2. Step 2: Convert to fraction form
    46,990.40/70,469.21 = 18,903.17/x
  3. Step 3: Cross multiply
    46,990.40x = 70,469.21 × 18,903.17
  4. Step 4: Simplify right side
    46,990.40x = 1,332,091,361.88
  5. Step 5: Solve for x
    x = 1,332,091,361.88/46,990.40
  6. Step 6: Final answer
    x = 28,348.16

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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.