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Finding the Fourth Proportional to 15,663.72, 21,616.02 and 8,493.69

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Solution

The fourth proportional to 15,663.72, 21,616.02 and 8,493.69 is: 11,721.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.72 : 21,616.02 = 8,493.69 : x
  2. Step 2: Convert to fraction form
    15,663.72/21,616.02 = 8,493.69/x
  3. Step 3: Cross multiply
    15,663.72x = 21,616.02 × 8,493.69
  4. Step 4: Simplify right side
    15,663.72x = 183,599,772.91
  5. Step 5: Solve for x
    x = 183,599,772.91/15,663.72
  6. Step 6: Final answer
    x = 11,721.34

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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.