Home / 13,347.66-20,021.24-3,987.72

Finding the Fourth Proportional to 13,347.66, 20,021.24 and 3,987.72

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Solution

The fourth proportional to 13,347.66, 20,021.24 and 3,987.72 is: 5,981.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.66 : 20,021.24 = 3,987.72 : x
  2. Step 2: Convert to fraction form
    13,347.66/20,021.24 = 3,987.72/x
  3. Step 3: Cross multiply
    13,347.66x = 20,021.24 × 3,987.72
  4. Step 4: Simplify right side
    13,347.66x = 79,839,099.17
  5. Step 5: Solve for x
    x = 79,839,099.17/13,347.66
  6. Step 6: Final answer
    x = 5,981.51

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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.