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Finding the Fourth Proportional to 5,169.88, 7,134.53 and 2,931.72

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Solution

The fourth proportional to 5,169.88, 7,134.53 and 2,931.72 is: 4,045.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,169.88 : 7,134.53 = 2,931.72 : x
  2. Step 2: Convert to fraction form
    5,169.88/7,134.53 = 2,931.72/x
  3. Step 3: Cross multiply
    5,169.88x = 7,134.53 × 2,931.72
  4. Step 4: Simplify right side
    5,169.88x = 20,916,444.29
  5. Step 5: Solve for x
    x = 20,916,444.29/5,169.88
  6. Step 6: Final answer
    x = 4,045.83

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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.