Home / 13,981.14-20,972.52-4,120.74

Finding the Fourth Proportional to 13,981.14, 20,972.52 and 4,120.74

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Solution

The fourth proportional to 13,981.14, 20,972.52 and 4,120.74 is: 6,181.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.14 : 20,972.52 = 4,120.74 : x
  2. Step 2: Convert to fraction form
    13,981.14/20,972.52 = 4,120.74/x
  3. Step 3: Cross multiply
    13,981.14x = 20,972.52 × 4,120.74
  4. Step 4: Simplify right side
    13,981.14x = 86,422,302.06
  5. Step 5: Solve for x
    x = 86,422,302.06/13,981.14
  6. Step 6: Final answer
    x = 6,181.35

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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.