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Finding the Fourth Proportional to 30,658.50, 45,987.75 and 12,203.46

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Solution

The fourth proportional to 30,658.50, 45,987.75 and 12,203.46 is: 18,305.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,658.50 : 45,987.75 = 12,203.46 : x
  2. Step 2: Convert to fraction form
    30,658.50/45,987.75 = 12,203.46/x
  3. Step 3: Cross multiply
    30,658.50x = 45,987.75 × 12,203.46
  4. Step 4: Simplify right side
    30,658.50x = 561,209,667.62
  5. Step 5: Solve for x
    x = 561,209,667.62/30,658.50
  6. Step 6: Final answer
    x = 18,305.19

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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.