Home / 14,508.42-20,021.55-8,220.78

Finding the Fourth Proportional to 14,508.42, 20,021.55 and 8,220.78

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Solution

The fourth proportional to 14,508.42, 20,021.55 and 8,220.78 is: 11,344.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,508.42 : 20,021.55 = 8,220.78 : x
  2. Step 2: Convert to fraction form
    14,508.42/20,021.55 = 8,220.78/x
  3. Step 3: Cross multiply
    14,508.42x = 20,021.55 × 8,220.78
  4. Step 4: Simplify right side
    14,508.42x = 164,592,757.81
  5. Step 5: Solve for x
    x = 164,592,757.81/14,508.42
  6. Step 6: Final answer
    x = 11,344.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.