Home / 11,153.56-15,387.90-7,801.72

Finding the Fourth Proportional to 11,153.56, 15,387.90 and 7,801.72

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Solution

The fourth proportional to 11,153.56, 15,387.90 and 7,801.72 is: 10,763.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,153.56 : 15,387.90 = 7,801.72 : x
  2. Step 2: Convert to fraction form
    11,153.56/15,387.90 = 7,801.72/x
  3. Step 3: Cross multiply
    11,153.56x = 15,387.90 × 7,801.72
  4. Step 4: Simplify right side
    11,153.56x = 120,052,087.19
  5. Step 5: Solve for x
    x = 120,052,087.19/11,153.56
  6. Step 6: Final answer
    x = 10,763.57

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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.