Home / 13,717.87-18,931.05-7,749.79

Finding the Fourth Proportional to 13,717.87, 18,931.05 and 7,749.79

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Solution

The fourth proportional to 13,717.87, 18,931.05 and 7,749.79 is: 10,694.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,717.87 : 18,931.05 = 7,749.79 : x
  2. Step 2: Convert to fraction form
    13,717.87/18,931.05 = 7,749.79/x
  3. Step 3: Cross multiply
    13,717.87x = 18,931.05 × 7,749.79
  4. Step 4: Simplify right side
    13,717.87x = 146,711,661.98
  5. Step 5: Solve for x
    x = 146,711,661.98/13,717.87
  6. Step 6: Final answer
    x = 10,694.93

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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.