Home / 28,712.31-43,071.71-13,125.75

Finding the Fourth Proportional to 28,712.31, 43,071.71 and 13,125.75

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Solution

The fourth proportional to 28,712.31, 43,071.71 and 13,125.75 is: 19,690.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.31 : 43,071.71 = 13,125.75 : x
  2. Step 2: Convert to fraction form
    28,712.31/43,071.71 = 13,125.75/x
  3. Step 3: Cross multiply
    28,712.31x = 43,071.71 × 13,125.75
  4. Step 4: Simplify right side
    28,712.31x = 565,348,431.90
  5. Step 5: Solve for x
    x = 565,348,431.90/28,712.31
  6. Step 6: Final answer
    x = 19,690.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.