Home / 11,535.85-15,912.08-7,279.40

Finding the Fourth Proportional to 11,535.85, 15,912.08 and 7,279.40

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Solution

The fourth proportional to 11,535.85, 15,912.08 and 7,279.40 is: 10,040.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,535.85 : 15,912.08 = 7,279.40 : x
  2. Step 2: Convert to fraction form
    11,535.85/15,912.08 = 7,279.40/x
  3. Step 3: Cross multiply
    11,535.85x = 15,912.08 × 7,279.40
  4. Step 4: Simplify right side
    11,535.85x = 115,830,333.79
  5. Step 5: Solve for x
    x = 115,830,333.79/11,535.85
  6. Step 6: Final answer
    x = 10,040.90

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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.