Home / 28,409.88-39,205.92-15,663.58

Finding the Fourth Proportional to 28,409.88, 39,205.92 and 15,663.58

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Solution

The fourth proportional to 28,409.88, 39,205.92 and 15,663.58 is: 21,615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.88 : 39,205.92 = 15,663.58 : x
  2. Step 2: Convert to fraction form
    28,409.88/39,205.92 = 15,663.58/x
  3. Step 3: Cross multiply
    28,409.88x = 39,205.92 × 15,663.58
  4. Step 4: Simplify right side
    28,409.88x = 614,105,064.39
  5. Step 5: Solve for x
    x = 614,105,064.39/28,409.88
  6. Step 6: Final answer
    x = 21,615.90

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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.