Home / 28,304.12-39,057.90-15,728.12

Finding the Fourth Proportional to 28,304.12, 39,057.90 and 15,728.12

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Solution

The fourth proportional to 28,304.12, 39,057.90 and 15,728.12 is: 21,703.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,304.12 : 39,057.90 = 15,728.12 : x
  2. Step 2: Convert to fraction form
    28,304.12/39,057.90 = 15,728.12/x
  3. Step 3: Cross multiply
    28,304.12x = 39,057.90 × 15,728.12
  4. Step 4: Simplify right side
    28,304.12x = 614,307,338.15
  5. Step 5: Solve for x
    x = 614,307,338.15/28,304.12
  6. Step 6: Final answer
    x = 21,703.81

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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.