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Finding the Fourth Proportional to 15,703.31, 21,670.41 and 8,629.58

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Solution

The fourth proportional to 15,703.31, 21,670.41 and 8,629.58 is: 11,908.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703.31 : 21,670.41 = 8,629.58 : x
  2. Step 2: Convert to fraction form
    15,703.31/21,670.41 = 8,629.58/x
  3. Step 3: Cross multiply
    15,703.31x = 21,670.41 × 8,629.58
  4. Step 4: Simplify right side
    15,703.31x = 187,006,536.73
  5. Step 5: Solve for x
    x = 187,006,536.73/15,703.31
  6. Step 6: Final answer
    x = 11,908.73

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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.