Home / 20,963.21-31,295.40-18,211.37

Finding the Fourth Proportional to 20,963.21, 31,295.40 and 18,211.37

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Solution

The fourth proportional to 20,963.21, 31,295.40 and 18,211.37 is: 27,187.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.21 : 31,295.40 = 18,211.37 : x
  2. Step 2: Convert to fraction form
    20,963.21/31,295.40 = 18,211.37/x
  3. Step 3: Cross multiply
    20,963.21x = 31,295.40 × 18,211.37
  4. Step 4: Simplify right side
    20,963.21x = 569,931,883.93
  5. Step 5: Solve for x
    x = 569,931,883.93/20,963.21
  6. Step 6: Final answer
    x = 27,187.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.