Home / 45,147.36-67,720.32-12,315.36

Finding the Fourth Proportional to 45,147.36, 67,720.32 and 12,315.36

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Solution

The fourth proportional to 45,147.36, 67,720.32 and 12,315.36 is: 18,472.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,147.36 : 67,720.32 = 12,315.36 : x
  2. Step 2: Convert to fraction form
    45,147.36/67,720.32 = 12,315.36/x
  3. Step 3: Cross multiply
    45,147.36x = 67,720.32 × 12,315.36
  4. Step 4: Simplify right side
    45,147.36x = 834,000,120.12
  5. Step 5: Solve for x
    x = 834,000,120.12/45,147.36
  6. Step 6: Final answer
    x = 18,472.84

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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.