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Finding the Fourth Proportional to 7,210.90, 9,951.42 and 4,227.70

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Solution

The fourth proportional to 7,210.90, 9,951.42 and 4,227.70 is: 5,834.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,210.90 : 9,951.42 = 4,227.70 : x
  2. Step 2: Convert to fraction form
    7,210.90/9,951.42 = 4,227.70/x
  3. Step 3: Cross multiply
    7,210.90x = 9,951.42 × 4,227.70
  4. Step 4: Simplify right side
    7,210.90x = 42,071,618.33
  5. Step 5: Solve for x
    x = 42,071,618.33/7,210.90
  6. Step 6: Final answer
    x = 5,834.45

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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.