Home / 28,392.12-39,182.90-15,645.29

Finding the Fourth Proportional to 28,392.12, 39,182.90 and 15,645.29

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Solution

The fourth proportional to 28,392.12, 39,182.90 and 15,645.29 is: 21,591.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,392.12 : 39,182.90 = 15,645.29 : x
  2. Step 2: Convert to fraction form
    28,392.12/39,182.90 = 15,645.29/x
  3. Step 3: Cross multiply
    28,392.12x = 39,182.90 × 15,645.29
  4. Step 4: Simplify right side
    28,392.12x = 613,027,559.40
  5. Step 5: Solve for x
    x = 613,027,559.40/28,392.12
  6. Step 6: Final answer
    x = 21,591.47

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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.