Home / 21,031.71-31,593.37-12,715.64

Finding the Fourth Proportional to 21,031.71, 31,593.37 and 12,715.64

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Solution

The fourth proportional to 21,031.71, 31,593.37 and 12,715.64 is: 19,101.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.71 : 31,593.37 = 12,715.64 : x
  2. Step 2: Convert to fraction form
    21,031.71/31,593.37 = 12,715.64/x
  3. Step 3: Cross multiply
    21,031.71x = 31,593.37 × 12,715.64
  4. Step 4: Simplify right side
    21,031.71x = 401,729,919.31
  5. Step 5: Solve for x
    x = 401,729,919.31/21,031.71
  6. Step 6: Final answer
    x = 19,101.15

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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.