Home / 20,280.45-30,420.68-14,707.65

Finding the Fourth Proportional to 20,280.45, 30,420.68 and 14,707.65

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Solution

The fourth proportional to 20,280.45, 30,420.68 and 14,707.65 is: 22,061.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.45 : 30,420.68 = 14,707.65 : x
  2. Step 2: Convert to fraction form
    20,280.45/30,420.68 = 14,707.65/x
  3. Step 3: Cross multiply
    20,280.45x = 30,420.68 × 14,707.65
  4. Step 4: Simplify right side
    20,280.45x = 447,416,640.66
  5. Step 5: Solve for x
    x = 447,416,640.66/20,280.45
  6. Step 6: Final answer
    x = 22,061.48

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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.