Home / 21,076.81-31,630.79-9,983.51

Finding the Fourth Proportional to 21,076.81, 31,630.79 and 9,983.51

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Solution

The fourth proportional to 21,076.81, 31,630.79 and 9,983.51 is: 14,982.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.81 : 31,630.79 = 9,983.51 : x
  2. Step 2: Convert to fraction form
    21,076.81/31,630.79 = 9,983.51/x
  3. Step 3: Cross multiply
    21,076.81x = 31,630.79 × 9,983.51
  4. Step 4: Simplify right side
    21,076.81x = 315,786,412.31
  5. Step 5: Solve for x
    x = 315,786,412.31/21,076.81
  6. Step 6: Final answer
    x = 14,982.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.