Home / 15,725.72-21,701.49-8,651.99

Finding the Fourth Proportional to 15,725.72, 21,701.49 and 8,651.99

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Solution

The fourth proportional to 15,725.72, 21,701.49 and 8,651.99 is: 11,939.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,725.72 : 21,701.49 = 8,651.99 : x
  2. Step 2: Convert to fraction form
    15,725.72/21,701.49 = 8,651.99/x
  3. Step 3: Cross multiply
    15,725.72x = 21,701.49 × 8,651.99
  4. Step 4: Simplify right side
    15,725.72x = 187,761,074.47
  5. Step 5: Solve for x
    x = 187,761,074.47/15,725.72
  6. Step 6: Final answer
    x = 11,939.74

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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.