Home / 8,420.93-12,632.55-2,872.79

Finding the Fourth Proportional to 8,420.93, 12,632.55 and 2,872.79

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Solution

The fourth proportional to 8,420.93, 12,632.55 and 2,872.79 is: 4,309.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.93 : 12,632.55 = 2,872.79 : x
  2. Step 2: Convert to fraction form
    8,420.93/12,632.55 = 2,872.79/x
  3. Step 3: Cross multiply
    8,420.93x = 12,632.55 × 2,872.79
  4. Step 4: Simplify right side
    8,420.93x = 36,290,600.42
  5. Step 5: Solve for x
    x = 36,290,600.42/8,420.93
  6. Step 6: Final answer
    x = 4,309.57

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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.