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Finding the Fourth Proportional to 28,716, 39,627.36 and 15,969.20

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Solution

The fourth proportional to 28,716, 39,627.36 and 15,969.20 is: 22,037.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,716 : 39,627.36 = 15,969.20 : x
  2. Step 2: Convert to fraction form
    28,716/39,627.36 = 15,969.20/x
  3. Step 3: Cross multiply
    28,716x = 39,627.36 × 15,969.20
  4. Step 4: Simplify right side
    28,716x = 632,817,237.31
  5. Step 5: Solve for x
    x = 632,817,237.31/28,716
  6. Step 6: Final answer
    x = 22,037.10

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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.