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Finding the Fourth Proportional to 28,681.59, 43,015.90 and 10,905.91

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Solution

The fourth proportional to 28,681.59, 43,015.90 and 10,905.91 is: 16,356.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.59 : 43,015.90 = 10,905.91 : x
  2. Step 2: Convert to fraction form
    28,681.59/43,015.90 = 10,905.91/x
  3. Step 3: Cross multiply
    28,681.59x = 43,015.90 × 10,905.91
  4. Step 4: Simplify right side
    28,681.59x = 469,127,399.16
  5. Step 5: Solve for x
    x = 469,127,399.16/28,681.59
  6. Step 6: Final answer
    x = 16,356.39

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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.