Home / 21,031.35-28,964.22-20,572.08

Finding the Fourth Proportional to 21,031.35, 28,964.22 and 20,572.08

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Solution

The fourth proportional to 21,031.35, 28,964.22 and 20,572.08 is: 28,331.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.35 : 28,964.22 = 20,572.08 : x
  2. Step 2: Convert to fraction form
    21,031.35/28,964.22 = 20,572.08/x
  3. Step 3: Cross multiply
    21,031.35x = 28,964.22 × 20,572.08
  4. Step 4: Simplify right side
    21,031.35x = 595,854,309.60
  5. Step 5: Solve for x
    x = 595,854,309.60/21,031.35
  6. Step 6: Final answer
    x = 28,331.71

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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.