Home / 28,965.78-39,992.13-19,530.90

Finding the Fourth Proportional to 28,965.78, 39,992.13 and 19,530.90

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Solution

The fourth proportional to 28,965.78, 39,992.13 and 19,530.90 is: 26,965.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,965.78 : 39,992.13 = 19,530.90 : x
  2. Step 2: Convert to fraction form
    28,965.78/39,992.13 = 19,530.90/x
  3. Step 3: Cross multiply
    28,965.78x = 39,992.13 × 19,530.90
  4. Step 4: Simplify right side
    28,965.78x = 781,082,291.82
  5. Step 5: Solve for x
    x = 781,082,291.82/28,965.78
  6. Step 6: Final answer
    x = 26,965.69

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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.