Home / 28,455.82-39,272.98-15,881.38

Finding the Fourth Proportional to 28,455.82, 39,272.98 and 15,881.38

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Solution

The fourth proportional to 28,455.82, 39,272.98 and 15,881.38 is: 21,918.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.82 : 39,272.98 = 15,881.38 : x
  2. Step 2: Convert to fraction form
    28,455.82/39,272.98 = 15,881.38/x
  3. Step 3: Cross multiply
    28,455.82x = 39,272.98 × 15,881.38
  4. Step 4: Simplify right side
    28,455.82x = 623,709,119.11
  5. Step 5: Solve for x
    x = 623,709,119.11/28,455.82
  6. Step 6: Final answer
    x = 21,918.51

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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.