Home / 13,986.84-20,973.78-5,215.44

Finding the Fourth Proportional to 13,986.84, 20,973.78 and 5,215.44

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Solution

The fourth proportional to 13,986.84, 20,973.78 and 5,215.44 is: 7,820.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.84 : 20,973.78 = 5,215.44 : x
  2. Step 2: Convert to fraction form
    13,986.84/20,973.78 = 5,215.44/x
  3. Step 3: Cross multiply
    13,986.84x = 20,973.78 × 5,215.44
  4. Step 4: Simplify right side
    13,986.84x = 109,387,491.16
  5. Step 5: Solve for x
    x = 109,387,491.16/13,986.84
  6. Step 6: Final answer
    x = 7,820.74

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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.