Home / 28,156.82-38,856.42-15,409.99

Finding the Fourth Proportional to 28,156.82, 38,856.42 and 15,409.99

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Solution

The fourth proportional to 28,156.82, 38,856.42 and 15,409.99 is: 21,265.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.82 : 38,856.42 = 15,409.99 : x
  2. Step 2: Convert to fraction form
    28,156.82/38,856.42 = 15,409.99/x
  3. Step 3: Cross multiply
    28,156.82x = 38,856.42 × 15,409.99
  4. Step 4: Simplify right side
    28,156.82x = 598,776,939.58
  5. Step 5: Solve for x
    x = 598,776,939.58/28,156.82
  6. Step 6: Final answer
    x = 21,265.79

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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.