Home / 13,878.75-20,818.14-3,490.50

Finding the Fourth Proportional to 13,878.75, 20,818.14 and 3,490.50

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Solution

The fourth proportional to 13,878.75, 20,818.14 and 3,490.50 is: 5,235.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.75 : 20,818.14 = 3,490.50 : x
  2. Step 2: Convert to fraction form
    13,878.75/20,818.14 = 3,490.50/x
  3. Step 3: Cross multiply
    13,878.75x = 20,818.14 × 3,490.50
  4. Step 4: Simplify right side
    13,878.75x = 72,665,717.67
  5. Step 5: Solve for x
    x = 72,665,717.67/13,878.75
  6. Step 6: Final answer
    x = 5,235.75

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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.