Home / 28,281.25-42,428.73-8,558.68

Finding the Fourth Proportional to 28,281.25, 42,428.73 and 8,558.68

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Solution

The fourth proportional to 28,281.25, 42,428.73 and 8,558.68 is: 12,840.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,281.25 : 42,428.73 = 8,558.68 : x
  2. Step 2: Convert to fraction form
    28,281.25/42,428.73 = 8,558.68/x
  3. Step 3: Cross multiply
    28,281.25x = 42,428.73 × 8,558.68
  4. Step 4: Simplify right side
    28,281.25x = 363,133,922.88
  5. Step 5: Solve for x
    x = 363,133,922.88/28,281.25
  6. Step 6: Final answer
    x = 12,840.09

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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.