Home / 15,731.43-21,709.41-8,561.35

Finding the Fourth Proportional to 15,731.43, 21,709.41 and 8,561.35

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Solution

The fourth proportional to 15,731.43, 21,709.41 and 8,561.35 is: 11,814.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.43 : 21,709.41 = 8,561.35 : x
  2. Step 2: Convert to fraction form
    15,731.43/21,709.41 = 8,561.35/x
  3. Step 3: Cross multiply
    15,731.43x = 21,709.41 × 8,561.35
  4. Step 4: Simplify right side
    15,731.43x = 185,861,803.03
  5. Step 5: Solve for x
    x = 185,861,803.03/15,731.43
  6. Step 6: Final answer
    x = 11,814.68

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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.