Home / 13,731.81-18,931.58-10,908.56

Finding the Fourth Proportional to 13,731.81, 18,931.58 and 10,908.56

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Solution

The fourth proportional to 13,731.81, 18,931.58 and 10,908.56 is: 15,039.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.81 : 18,931.58 = 10,908.56 : x
  2. Step 2: Convert to fraction form
    13,731.81/18,931.58 = 10,908.56/x
  3. Step 3: Cross multiply
    13,731.81x = 18,931.58 × 10,908.56
  4. Step 4: Simplify right side
    13,731.81x = 206,516,174.45
  5. Step 5: Solve for x
    x = 206,516,174.45/13,731.81
  6. Step 6: Final answer
    x = 15,039.25

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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.