Home / 15,217.68-21,000.24-8,928.84

Finding the Fourth Proportional to 15,217.68, 21,000.24 and 8,928.84

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Solution

The fourth proportional to 15,217.68, 21,000.24 and 8,928.84 is: 12,321.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.68 : 21,000.24 = 8,928.84 : x
  2. Step 2: Convert to fraction form
    15,217.68/21,000.24 = 8,928.84/x
  3. Step 3: Cross multiply
    15,217.68x = 21,000.24 × 8,928.84
  4. Step 4: Simplify right side
    15,217.68x = 187,507,782.92
  5. Step 5: Solve for x
    x = 187,507,782.92/15,217.68
  6. Step 6: Final answer
    x = 12,321.71

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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.