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Finding the Fourth Proportional to 12,355.85, 18,530.98 and 5,685.94

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Solution

The fourth proportional to 12,355.85, 18,530.98 and 5,685.94 is: 8,527.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.85 : 18,530.98 = 5,685.94 : x
  2. Step 2: Convert to fraction form
    12,355.85/18,530.98 = 5,685.94/x
  3. Step 3: Cross multiply
    12,355.85x = 18,530.98 × 5,685.94
  4. Step 4: Simplify right side
    12,355.85x = 105,365,994.09
  5. Step 5: Solve for x
    x = 105,365,994.09/12,355.85
  6. Step 6: Final answer
    x = 8,527.62

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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.