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Finding the Fourth Proportional to 6,490.71, 9,721.47 and 4,551.57

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Solution

The fourth proportional to 6,490.71, 9,721.47 and 4,551.57 is: 6,817.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.71 : 9,721.47 = 4,551.57 : x
  2. Step 2: Convert to fraction form
    6,490.71/9,721.47 = 4,551.57/x
  3. Step 3: Cross multiply
    6,490.71x = 9,721.47 × 4,551.57
  4. Step 4: Simplify right side
    6,490.71x = 44,247,951.21
  5. Step 5: Solve for x
    x = 44,247,951.21/6,490.71
  6. Step 6: Final answer
    x = 6,817.12

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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.