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Finding the Fourth Proportional to 15,957.21, 22,011.27 and 9,983.97

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Solution

The fourth proportional to 15,957.21, 22,011.27 and 9,983.97 is: 13,771.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,957.21 : 22,011.27 = 9,983.97 : x
  2. Step 2: Convert to fraction form
    15,957.21/22,011.27 = 9,983.97/x
  3. Step 3: Cross multiply
    15,957.21x = 22,011.27 × 9,983.97
  4. Step 4: Simplify right side
    15,957.21x = 219,759,859.34
  5. Step 5: Solve for x
    x = 219,759,859.34/15,957.21
  6. Step 6: Final answer
    x = 13,771.82

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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.