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Finding the Fourth Proportional to 13,360.95, 20,072.48 and 8,378.64

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Solution

The fourth proportional to 13,360.95, 20,072.48 and 8,378.64 is: 12,587.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,360.95 : 20,072.48 = 8,378.64 : x
  2. Step 2: Convert to fraction form
    13,360.95/20,072.48 = 8,378.64/x
  3. Step 3: Cross multiply
    13,360.95x = 20,072.48 × 8,378.64
  4. Step 4: Simplify right side
    13,360.95x = 168,180,041.93
  5. Step 5: Solve for x
    x = 168,180,041.93/13,360.95
  6. Step 6: Final answer
    x = 12,587.43

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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.