Home / 28,788.57-43,140.87-12,758.76

Finding the Fourth Proportional to 28,788.57, 43,140.87 and 12,758.76

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Solution

The fourth proportional to 28,788.57, 43,140.87 and 12,758.76 is: 19,119.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,788.57 : 43,140.87 = 12,758.76 : x
  2. Step 2: Convert to fraction form
    28,788.57/43,140.87 = 12,758.76/x
  3. Step 3: Cross multiply
    28,788.57x = 43,140.87 × 12,758.76
  4. Step 4: Simplify right side
    28,788.57x = 550,424,006.52
  5. Step 5: Solve for x
    x = 550,424,006.52/28,788.57
  6. Step 6: Final answer
    x = 19,119.53

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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.