Home / 20,400.45-28,153.64-12,748.34

Finding the Fourth Proportional to 20,400.45, 28,153.64 and 12,748.34

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Solution

The fourth proportional to 20,400.45, 28,153.64 and 12,748.34 is: 17,593.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.45 : 28,153.64 = 12,748.34 : x
  2. Step 2: Convert to fraction form
    20,400.45/28,153.64 = 12,748.34/x
  3. Step 3: Cross multiply
    20,400.45x = 28,153.64 × 12,748.34
  4. Step 4: Simplify right side
    20,400.45x = 358,912,174.96
  5. Step 5: Solve for x
    x = 358,912,174.96/20,400.45
  6. Step 6: Final answer
    x = 17,593.35

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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.