Home / 21,031.82-31,526.43-13,640.97

Finding the Fourth Proportional to 21,031.82, 31,526.43 and 13,640.97

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Solution

The fourth proportional to 21,031.82, 31,526.43 and 13,640.97 is: 20,447.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.82 : 31,526.43 = 13,640.97 : x
  2. Step 2: Convert to fraction form
    21,031.82/31,526.43 = 13,640.97/x
  3. Step 3: Cross multiply
    21,031.82x = 31,526.43 × 13,640.97
  4. Step 4: Simplify right side
    21,031.82x = 430,051,085.84
  5. Step 5: Solve for x
    x = 430,051,085.84/21,031.82
  6. Step 6: Final answer
    x = 20,447.64

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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.