Home / 28,006.82-38,649.53-15,431.57

Finding the Fourth Proportional to 28,006.82, 38,649.53 and 15,431.57

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Solution

The fourth proportional to 28,006.82, 38,649.53 and 15,431.57 is: 21,295.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.82 : 38,649.53 = 15,431.57 : x
  2. Step 2: Convert to fraction form
    28,006.82/38,649.53 = 15,431.57/x
  3. Step 3: Cross multiply
    28,006.82x = 38,649.53 × 15,431.57
  4. Step 4: Simplify right side
    28,006.82x = 596,422,927.66
  5. Step 5: Solve for x
    x = 596,422,927.66/28,006.82
  6. Step 6: Final answer
    x = 21,295.63

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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.