Home / 15,120.96-20,870.31-8,408.94

Finding the Fourth Proportional to 15,120.96, 20,870.31 and 8,408.94

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Solution

The fourth proportional to 15,120.96, 20,870.31 and 8,408.94 is: 11,606.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.96 : 20,870.31 = 8,408.94 : x
  2. Step 2: Convert to fraction form
    15,120.96/20,870.31 = 8,408.94/x
  3. Step 3: Cross multiply
    15,120.96x = 20,870.31 × 8,408.94
  4. Step 4: Simplify right side
    15,120.96x = 175,497,184.57
  5. Step 5: Solve for x
    x = 175,497,184.57/15,120.96
  6. Step 6: Final answer
    x = 11,606.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.