Home / 7,938.40-11,907.54-2,391.72

Finding the Fourth Proportional to 7,938.40, 11,907.54 and 2,391.72

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Solution

The fourth proportional to 7,938.40, 11,907.54 and 2,391.72 is: 3,587.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,938.40 : 11,907.54 = 2,391.72 : x
  2. Step 2: Convert to fraction form
    7,938.40/11,907.54 = 2,391.72/x
  3. Step 3: Cross multiply
    7,938.40x = 11,907.54 × 2,391.72
  4. Step 4: Simplify right side
    7,938.40x = 28,479,501.57
  5. Step 5: Solve for x
    x = 28,479,501.57/7,938.40
  6. Step 6: Final answer
    x = 3,587.56

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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.