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Finding the Fourth Proportional to 7,339.76, 10,128.20 and 4,355.09

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Solution

The fourth proportional to 7,339.76, 10,128.20 and 4,355.09 is: 6,009.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.76 : 10,128.20 = 4,355.09 : x
  2. Step 2: Convert to fraction form
    7,339.76/10,128.20 = 4,355.09/x
  3. Step 3: Cross multiply
    7,339.76x = 10,128.20 × 4,355.09
  4. Step 4: Simplify right side
    7,339.76x = 44,109,150.12
  5. Step 5: Solve for x
    x = 44,109,150.12/7,339.76
  6. Step 6: Final answer
    x = 6,009.62

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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.