Home / 28,355.97-39,129.39-15,606.72

Finding the Fourth Proportional to 28,355.97, 39,129.39 and 15,606.72

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Solution

The fourth proportional to 28,355.97, 39,129.39 and 15,606.72 is: 21,536.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.97 : 39,129.39 = 15,606.72 : x
  2. Step 2: Convert to fraction form
    28,355.97/39,129.39 = 15,606.72/x
  3. Step 3: Cross multiply
    28,355.97x = 39,129.39 × 15,606.72
  4. Step 4: Simplify right side
    28,355.97x = 610,681,433.50
  5. Step 5: Solve for x
    x = 610,681,433.50/28,355.97
  6. Step 6: Final answer
    x = 21,536.26

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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.