Home / 21,750.36-30,016.20-12,318.72

Finding the Fourth Proportional to 21,750.36, 30,016.20 and 12,318.72

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Solution

The fourth proportional to 21,750.36, 30,016.20 and 12,318.72 is: 17,000.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.36 : 30,016.20 = 12,318.72 : x
  2. Step 2: Convert to fraction form
    21,750.36/30,016.20 = 12,318.72/x
  3. Step 3: Cross multiply
    21,750.36x = 30,016.20 × 12,318.72
  4. Step 4: Simplify right side
    21,750.36x = 369,761,163.26
  5. Step 5: Solve for x
    x = 369,761,163.26/21,750.36
  6. Step 6: Final answer
    x = 17,000.23

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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.