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Finding the Fourth Proportional to 15,725.53, 21,701.14 and 8,651.53

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Solution

The fourth proportional to 15,725.53, 21,701.14 and 8,651.53 is: 11,939.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,725.53 : 21,701.14 = 8,651.53 : x
  2. Step 2: Convert to fraction form
    15,725.53/21,701.14 = 8,651.53/x
  3. Step 3: Cross multiply
    15,725.53x = 21,701.14 × 8,651.53
  4. Step 4: Simplify right side
    15,725.53x = 187,748,063.74
  5. Step 5: Solve for x
    x = 187,748,063.74/15,725.53
  6. Step 6: Final answer
    x = 11,939.06

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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.