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Finding the Fourth Proportional to 7,219.90, 9,963.63 and 4,237.89

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Solution

The fourth proportional to 7,219.90, 9,963.63 and 4,237.89 is: 5,848.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,219.90 : 9,963.63 = 4,237.89 : x
  2. Step 2: Convert to fraction form
    7,219.90/9,963.63 = 4,237.89/x
  3. Step 3: Cross multiply
    7,219.90x = 9,963.63 × 4,237.89
  4. Step 4: Simplify right side
    7,219.90x = 42,224,767.94
  5. Step 5: Solve for x
    x = 42,224,767.94/7,219.90
  6. Step 6: Final answer
    x = 5,848.39

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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.