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Finding the Fourth Proportional to 15,697.36, 21,663.88 and 8,983.94

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Solution

The fourth proportional to 15,697.36, 21,663.88 and 8,983.94 is: 12,398.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,697.36 : 21,663.88 = 8,983.94 : x
  2. Step 2: Convert to fraction form
    15,697.36/21,663.88 = 8,983.94/x
  3. Step 3: Cross multiply
    15,697.36x = 21,663.88 × 8,983.94
  4. Step 4: Simplify right side
    15,697.36x = 194,627,029.79
  5. Step 5: Solve for x
    x = 194,627,029.79/15,697.36
  6. Step 6: Final answer
    x = 12,398.71

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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.