Home / 11,890.38-16,401.54-7,640.01

Finding the Fourth Proportional to 11,890.38, 16,401.54 and 7,640.01

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Solution

The fourth proportional to 11,890.38, 16,401.54 and 7,640.01 is: 10,538.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,890.38 : 16,401.54 = 7,640.01 : x
  2. Step 2: Convert to fraction form
    11,890.38/16,401.54 = 7,640.01/x
  3. Step 3: Cross multiply
    11,890.38x = 16,401.54 × 7,640.01
  4. Step 4: Simplify right side
    11,890.38x = 125,307,929.62
  5. Step 5: Solve for x
    x = 125,307,929.62/11,890.38
  6. Step 6: Final answer
    x = 10,538.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.