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Finding the Fourth Proportional to 30,415.63, 45,636.09 and 12,650.18

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Solution

The fourth proportional to 30,415.63, 45,636.09 and 12,650.18 is: 18,980.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,415.63 : 45,636.09 = 12,650.18 : x
  2. Step 2: Convert to fraction form
    30,415.63/45,636.09 = 12,650.18/x
  3. Step 3: Cross multiply
    30,415.63x = 45,636.09 × 12,650.18
  4. Step 4: Simplify right side
    30,415.63x = 577,304,753.00
  5. Step 5: Solve for x
    x = 577,304,753.00/30,415.63
  6. Step 6: Final answer
    x = 18,980.53

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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.