Home / 13,381.36-20,108.36-7,145.71

Finding the Fourth Proportional to 13,381.36, 20,108.36 and 7,145.71

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Solution

The fourth proportional to 13,381.36, 20,108.36 and 7,145.71 is: 10,737.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.36 : 20,108.36 = 7,145.71 : x
  2. Step 2: Convert to fraction form
    13,381.36/20,108.36 = 7,145.71/x
  3. Step 3: Cross multiply
    13,381.36x = 20,108.36 × 7,145.71
  4. Step 4: Simplify right side
    13,381.36x = 143,688,473.41
  5. Step 5: Solve for x
    x = 143,688,473.41/13,381.36
  6. Step 6: Final answer
    x = 10,737.96

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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.