Home / 21,206.82-31,780.14-15,616.32

Finding the Fourth Proportional to 21,206.82, 31,780.14 and 15,616.32

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Solution

The fourth proportional to 21,206.82, 31,780.14 and 15,616.32 is: 23,402.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,206.82 : 31,780.14 = 15,616.32 : x
  2. Step 2: Convert to fraction form
    21,206.82/31,780.14 = 15,616.32/x
  3. Step 3: Cross multiply
    21,206.82x = 31,780.14 × 15,616.32
  4. Step 4: Simplify right side
    21,206.82x = 496,288,835.88
  5. Step 5: Solve for x
    x = 496,288,835.88/21,206.82
  6. Step 6: Final answer
    x = 23,402.32

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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.