Home / 21,076.34-31,588.20-13,559.90

Finding the Fourth Proportional to 21,076.34, 31,588.20 and 13,559.90

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Solution

The fourth proportional to 21,076.34, 31,588.20 and 13,559.90 is: 20,322.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.34 : 31,588.20 = 13,559.90 : x
  2. Step 2: Convert to fraction form
    21,076.34/31,588.20 = 13,559.90/x
  3. Step 3: Cross multiply
    21,076.34x = 31,588.20 × 13,559.90
  4. Step 4: Simplify right side
    21,076.34x = 428,332,675.24
  5. Step 5: Solve for x
    x = 428,332,675.24/21,076.34
  6. Step 6: Final answer
    x = 20,322.92

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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.