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Finding the Fourth Proportional to 15,703.37, 21,669.39 and 8,987.46

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Solution

The fourth proportional to 15,703.37, 21,669.39 and 8,987.46 is: 12,401.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703.37 : 21,669.39 = 8,987.46 : x
  2. Step 2: Convert to fraction form
    15,703.37/21,669.39 = 8,987.46/x
  3. Step 3: Cross multiply
    15,703.37x = 21,669.39 × 8,987.46
  4. Step 4: Simplify right side
    15,703.37x = 194,752,775.85
  5. Step 5: Solve for x
    x = 194,752,775.85/15,703.37
  6. Step 6: Final answer
    x = 12,401.97

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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.