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Finding the Fourth Proportional to 12,005.80, 18,003.30 and 4,607.80

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Solution

The fourth proportional to 12,005.80, 18,003.30 and 4,607.80 is: 6,909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.80 : 18,003.30 = 4,607.80 : x
  2. Step 2: Convert to fraction form
    12,005.80/18,003.30 = 4,607.80/x
  3. Step 3: Cross multiply
    12,005.80x = 18,003.30 × 4,607.80
  4. Step 4: Simplify right side
    12,005.80x = 82,955,605.74
  5. Step 5: Solve for x
    x = 82,955,605.74/12,005.80
  6. Step 6: Final answer
    x = 6,909.63

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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.