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Finding the Fourth Proportional to 28,358.46, 42,538.05 and 9,890.46

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Solution

The fourth proportional to 28,358.46, 42,538.05 and 9,890.46 is: 14,835.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.46 : 42,538.05 = 9,890.46 : x
  2. Step 2: Convert to fraction form
    28,358.46/42,538.05 = 9,890.46/x
  3. Step 3: Cross multiply
    28,358.46x = 42,538.05 × 9,890.46
  4. Step 4: Simplify right side
    28,358.46x = 420,720,882.00
  5. Step 5: Solve for x
    x = 420,720,882.00/28,358.46
  6. Step 6: Final answer
    x = 14,835.82

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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.