Home / 13,431.90-20,133.45-5,108.70

Finding the Fourth Proportional to 13,431.90, 20,133.45 and 5,108.70

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Solution

The fourth proportional to 13,431.90, 20,133.45 and 5,108.70 is: 7,657.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.90 : 20,133.45 = 5,108.70 : x
  2. Step 2: Convert to fraction form
    13,431.90/20,133.45 = 5,108.70/x
  3. Step 3: Cross multiply
    13,431.90x = 20,133.45 × 5,108.70
  4. Step 4: Simplify right side
    13,431.90x = 102,855,756.02
  5. Step 5: Solve for x
    x = 102,855,756.02/13,431.90
  6. Step 6: Final answer
    x = 7,657.57

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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.