Home / 30,381.45-45,582.67-12,621.65

Finding the Fourth Proportional to 30,381.45, 45,582.67 and 12,621.65

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Solution

The fourth proportional to 30,381.45, 45,582.67 and 12,621.65 is: 18,936.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,381.45 : 45,582.67 = 12,621.65 : x
  2. Step 2: Convert to fraction form
    30,381.45/45,582.67 = 12,621.65/x
  3. Step 3: Cross multiply
    30,381.45x = 45,582.67 × 12,621.65
  4. Step 4: Simplify right side
    30,381.45x = 575,328,565.54
  5. Step 5: Solve for x
    x = 575,328,565.54/30,381.45
  6. Step 6: Final answer
    x = 18,936.83

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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.