Home / 13,105.79-18,103.30-9,709.69

Finding the Fourth Proportional to 13,105.79, 18,103.30 and 9,709.69

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Solution

The fourth proportional to 13,105.79, 18,103.30 and 9,709.69 is: 13,412.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.79 : 18,103.30 = 9,709.69 : x
  2. Step 2: Convert to fraction form
    13,105.79/18,103.30 = 9,709.69/x
  3. Step 3: Cross multiply
    13,105.79x = 18,103.30 × 9,709.69
  4. Step 4: Simplify right side
    13,105.79x = 175,777,430.98
  5. Step 5: Solve for x
    x = 175,777,430.98/13,105.79
  6. Step 6: Final answer
    x = 13,412.20

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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.