Home / 28,409.63-39,205.49-15,663.29

Finding the Fourth Proportional to 28,409.63, 39,205.49 and 15,663.29

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Solution

The fourth proportional to 28,409.63, 39,205.49 and 15,663.29 is: 21,615.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409.63 : 39,205.49 = 15,663.29 : x
  2. Step 2: Convert to fraction form
    28,409.63/39,205.49 = 15,663.29/x
  3. Step 3: Cross multiply
    28,409.63x = 39,205.49 × 15,663.29
  4. Step 4: Simplify right side
    28,409.63x = 614,086,685.12
  5. Step 5: Solve for x
    x = 614,086,685.12/28,409.63
  6. Step 6: Final answer
    x = 21,615.44

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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.