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Finding the Fourth Proportional to 28,308, 39,065.04 and 15,735.24

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Solution

The fourth proportional to 28,308, 39,065.04 and 15,735.24 is: 21,714.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,308 : 39,065.04 = 15,735.24 : x
  2. Step 2: Convert to fraction form
    28,308/39,065.04 = 15,735.24/x
  3. Step 3: Cross multiply
    28,308x = 39,065.04 × 15,735.24
  4. Step 4: Simplify right side
    28,308x = 614,697,780.01
  5. Step 5: Solve for x
    x = 614,697,780.01/28,308
  6. Step 6: Final answer
    x = 21,714.63

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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.