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Finding the Fourth Proportional to 6,931, 9,565 and 3,787.40

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Solution

The fourth proportional to 6,931, 9,565 and 3,787.40 is: 5,226.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,931 : 9,565 = 3,787.40 : x
  2. Step 2: Convert to fraction form
    6,931/9,565 = 3,787.40/x
  3. Step 3: Cross multiply
    6,931x = 9,565 × 3,787.40
  4. Step 4: Simplify right side
    6,931x = 36,226,481
  5. Step 5: Solve for x
    x = 36,226,481/6,931
  6. Step 6: Final answer
    x = 5,226.73

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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.