Home / 8,315.28-11,478.78-5,173.56

Finding the Fourth Proportional to 8,315.28, 11,478.78 and 5,173.56

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Solution

The fourth proportional to 8,315.28, 11,478.78 and 5,173.56 is: 7,141.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.28 : 11,478.78 = 5,173.56 : x
  2. Step 2: Convert to fraction form
    8,315.28/11,478.78 = 5,173.56/x
  3. Step 3: Cross multiply
    8,315.28x = 11,478.78 × 5,173.56
  4. Step 4: Simplify right side
    8,315.28x = 59,386,157.06
  5. Step 5: Solve for x
    x = 59,386,157.06/8,315.28
  6. Step 6: Final answer
    x = 7,141.81

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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.