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Finding the Fourth Proportional to 28,885.88, 43,315.86 and 13,295

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Solution

The fourth proportional to 28,885.88, 43,315.86 and 13,295 is: 19,936.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,885.88 : 43,315.86 = 13,295 : x
  2. Step 2: Convert to fraction form
    28,885.88/43,315.86 = 13,295/x
  3. Step 3: Cross multiply
    28,885.88x = 43,315.86 × 13,295
  4. Step 4: Simplify right side
    28,885.88x = 575,884,358.70
  5. Step 5: Solve for x
    x = 575,884,358.70/28,885.88
  6. Step 6: Final answer
    x = 19,936.54

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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.