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Finding the Fourth Proportional to 7,721.68, 10,641.64 and 5,483.64

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Solution

The fourth proportional to 7,721.68, 10,641.64 and 5,483.64 is: 7,557.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.68 : 10,641.64 = 5,483.64 : x
  2. Step 2: Convert to fraction form
    7,721.68/10,641.64 = 5,483.64/x
  3. Step 3: Cross multiply
    7,721.68x = 10,641.64 × 5,483.64
  4. Step 4: Simplify right side
    7,721.68x = 58,354,922.77
  5. Step 5: Solve for x
    x = 58,354,922.77/7,721.68
  6. Step 6: Final answer
    x = 7,557.28

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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.