Home / 21,988.56-30,384.39-16,009.81

Finding the Fourth Proportional to 21,988.56, 30,384.39 and 16,009.81

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Solution

The fourth proportional to 21,988.56, 30,384.39 and 16,009.81 is: 22,122.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.56 : 30,384.39 = 16,009.81 : x
  2. Step 2: Convert to fraction form
    21,988.56/30,384.39 = 16,009.81/x
  3. Step 3: Cross multiply
    21,988.56x = 30,384.39 × 16,009.81
  4. Step 4: Simplify right side
    21,988.56x = 486,448,310.87
  5. Step 5: Solve for x
    x = 486,448,310.87/21,988.56
  6. Step 6: Final answer
    x = 22,122.79

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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.