Home / 28,107.70-42,166.12-13,129.80

Finding the Fourth Proportional to 28,107.70, 42,166.12 and 13,129.80

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Solution

The fourth proportional to 28,107.70, 42,166.12 and 13,129.80 is: 19,696.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.70 : 42,166.12 = 13,129.80 : x
  2. Step 2: Convert to fraction form
    28,107.70/42,166.12 = 13,129.80/x
  3. Step 3: Cross multiply
    28,107.70x = 42,166.12 × 13,129.80
  4. Step 4: Simplify right side
    28,107.70x = 553,632,722.38
  5. Step 5: Solve for x
    x = 553,632,722.38/28,107.70
  6. Step 6: Final answer
    x = 19,696.83

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1.5x scale

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.