Home / 13,878.70-20,818.25-4,518.77

Finding the Fourth Proportional to 13,878.70, 20,818.25 and 4,518.77

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Solution

The fourth proportional to 13,878.70, 20,818.25 and 4,518.77 is: 6,778.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.70 : 20,818.25 = 4,518.77 : x
  2. Step 2: Convert to fraction form
    13,878.70/20,818.25 = 4,518.77/x
  3. Step 3: Cross multiply
    13,878.70x = 20,818.25 × 4,518.77
  4. Step 4: Simplify right side
    13,878.70x = 94,072,883.55
  5. Step 5: Solve for x
    x = 94,072,883.55/13,878.70
  6. Step 6: Final answer
    x = 6,778.22

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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.