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Finding the Fourth Proportional to 15,687.97, 21,649.47 and 8,973.67

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Solution

The fourth proportional to 15,687.97, 21,649.47 and 8,973.67 is: 12,383.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.97 : 21,649.47 = 8,973.67 : x
  2. Step 2: Convert to fraction form
    15,687.97/21,649.47 = 8,973.67/x
  3. Step 3: Cross multiply
    15,687.97x = 21,649.47 × 8,973.67
  4. Step 4: Simplify right side
    15,687.97x = 194,275,199.45
  5. Step 5: Solve for x
    x = 194,275,199.45/15,687.97
  6. Step 6: Final answer
    x = 12,383.71

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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.