Home / 13,430.88-20,143.53-5,107.98

Finding the Fourth Proportional to 13,430.88, 20,143.53 and 5,107.98

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Solution

The fourth proportional to 13,430.88, 20,143.53 and 5,107.98 is: 7,660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.88 : 20,143.53 = 5,107.98 : x
  2. Step 2: Convert to fraction form
    13,430.88/20,143.53 = 5,107.98/x
  3. Step 3: Cross multiply
    13,430.88x = 20,143.53 × 5,107.98
  4. Step 4: Simplify right side
    13,430.88x = 102,892,748.37
  5. Step 5: Solve for x
    x = 102,892,748.37/13,430.88
  6. Step 6: Final answer
    x = 7,660.91

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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.