Home / 21,810.42-30,101.49-15,780.24

Finding the Fourth Proportional to 21,810.42, 30,101.49 and 15,780.24

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Solution

The fourth proportional to 21,810.42, 30,101.49 and 15,780.24 is: 21,778.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810.42 : 30,101.49 = 15,780.24 : x
  2. Step 2: Convert to fraction form
    21,810.42/30,101.49 = 15,780.24/x
  3. Step 3: Cross multiply
    21,810.42x = 30,101.49 × 15,780.24
  4. Step 4: Simplify right side
    21,810.42x = 475,008,736.56
  5. Step 5: Solve for x
    x = 475,008,736.56/21,810.42
  6. Step 6: Final answer
    x = 21,778.98

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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.