Home / 28,190.63-38,904.35-15,615.38

Finding the Fourth Proportional to 28,190.63, 38,904.35 and 15,615.38

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Solution

The fourth proportional to 28,190.63, 38,904.35 and 15,615.38 is: 21,549.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.63 : 38,904.35 = 15,615.38 : x
  2. Step 2: Convert to fraction form
    28,190.63/38,904.35 = 15,615.38/x
  3. Step 3: Cross multiply
    28,190.63x = 38,904.35 × 15,615.38
  4. Step 4: Simplify right side
    28,190.63x = 607,505,936.30
  5. Step 5: Solve for x
    x = 607,505,936.30/28,190.63
  6. Step 6: Final answer
    x = 21,549.93

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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.