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Finding the Fourth Proportional to 27,125.70, 40,688.55 and 8,405.70

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Solution

The fourth proportional to 27,125.70, 40,688.55 and 8,405.70 is: 12,608.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,125.70 : 40,688.55 = 8,405.70 : x
  2. Step 2: Convert to fraction form
    27,125.70/40,688.55 = 8,405.70/x
  3. Step 3: Cross multiply
    27,125.70x = 40,688.55 × 8,405.70
  4. Step 4: Simplify right side
    27,125.70x = 342,015,744.74
  5. Step 5: Solve for x
    x = 342,015,744.74/27,125.70
  6. Step 6: Final answer
    x = 12,608.55

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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.