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Finding the Fourth Proportional to 28,000, 42,004.36 and 10,472.32

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Solution

The fourth proportional to 28,000, 42,004.36 and 10,472.32 is: 15,710.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000 : 42,004.36 = 10,472.32 : x
  2. Step 2: Convert to fraction form
    28,000/42,004.36 = 10,472.32/x
  3. Step 3: Cross multiply
    28,000x = 42,004.36 × 10,472.32
  4. Step 4: Simplify right side
    28,000x = 439,883,099.32
  5. Step 5: Solve for x
    x = 439,883,099.32/28,000
  6. Step 6: Final answer
    x = 15,710.11

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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.