Home / 13,445.72-20,165.92-12,778.94

Finding the Fourth Proportional to 13,445.72, 20,165.92 and 12,778.94

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Solution

The fourth proportional to 13,445.72, 20,165.92 and 12,778.94 is: 19,165.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.72 : 20,165.92 = 12,778.94 : x
  2. Step 2: Convert to fraction form
    13,445.72/20,165.92 = 12,778.94/x
  3. Step 3: Cross multiply
    13,445.72x = 20,165.92 × 12,778.94
  4. Step 4: Simplify right side
    13,445.72x = 257,698,948.95
  5. Step 5: Solve for x
    x = 257,698,948.95/13,445.72
  6. Step 6: Final answer
    x = 19,165.88

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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.