Home / 28,394.64-39,186.32-15,647.79

Finding the Fourth Proportional to 28,394.64, 39,186.32 and 15,647.79

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Solution

The fourth proportional to 28,394.64, 39,186.32 and 15,647.79 is: 21,594.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,394.64 : 39,186.32 = 15,647.79 : x
  2. Step 2: Convert to fraction form
    28,394.64/39,186.32 = 15,647.79/x
  3. Step 3: Cross multiply
    28,394.64x = 39,186.32 × 15,647.79
  4. Step 4: Simplify right side
    28,394.64x = 613,179,154.52
  5. Step 5: Solve for x
    x = 613,179,154.52/28,394.64
  6. Step 6: Final answer
    x = 21,594.89

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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.