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Finding the Fourth Proportional to 9,160.78, 13,741.02 and 2,920.72

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Solution

The fourth proportional to 9,160.78, 13,741.02 and 2,920.72 is: 4,381.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,160.78 : 13,741.02 = 2,920.72 : x
  2. Step 2: Convert to fraction form
    9,160.78/13,741.02 = 2,920.72/x
  3. Step 3: Cross multiply
    9,160.78x = 13,741.02 × 2,920.72
  4. Step 4: Simplify right side
    9,160.78x = 40,133,671.93
  5. Step 5: Solve for x
    x = 40,133,671.93/9,160.78
  6. Step 6: Final answer
    x = 4,381.03

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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.