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Finding the Fourth Proportional to 7,479, 10,320.48 and 5,124.60

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Solution

The fourth proportional to 7,479, 10,320.48 and 5,124.60 is: 7,071.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479 : 10,320.48 = 5,124.60 : x
  2. Step 2: Convert to fraction form
    7,479/10,320.48 = 5,124.60/x
  3. Step 3: Cross multiply
    7,479x = 10,320.48 × 5,124.60
  4. Step 4: Simplify right side
    7,479x = 52,888,331.81
  5. Step 5: Solve for x
    x = 52,888,331.81/7,479
  6. Step 6: Final answer
    x = 7,071.58

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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.