Home / 28,490.40-42,735.89-18,691.83

Finding the Fourth Proportional to 28,490.40, 42,735.89 and 18,691.83

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Solution

The fourth proportional to 28,490.40, 42,735.89 and 18,691.83 is: 28,037.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.40 : 42,735.89 = 18,691.83 : x
  2. Step 2: Convert to fraction form
    28,490.40/42,735.89 = 18,691.83/x
  3. Step 3: Cross multiply
    28,490.40x = 42,735.89 × 18,691.83
  4. Step 4: Simplify right side
    28,490.40x = 798,811,897.32
  5. Step 5: Solve for x
    x = 798,811,897.32/28,490.40
  6. Step 6: Final answer
    x = 28,037.93

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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.