Home / 12,315.65-18,441.27-10,571.72

Finding the Fourth Proportional to 12,315.65, 18,441.27 and 10,571.72

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Solution

The fourth proportional to 12,315.65, 18,441.27 and 10,571.72 is: 15,829.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.65 : 18,441.27 = 10,571.72 : x
  2. Step 2: Convert to fraction form
    12,315.65/18,441.27 = 10,571.72/x
  3. Step 3: Cross multiply
    12,315.65x = 18,441.27 × 10,571.72
  4. Step 4: Simplify right side
    12,315.65x = 194,955,850.68
  5. Step 5: Solve for x
    x = 194,955,850.68/12,315.65
  6. Step 6: Final answer
    x = 15,829.93

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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.