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Finding the Fourth Proportional to 7,620.48, 11,430.72 and 2,148.48

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Solution

The fourth proportional to 7,620.48, 11,430.72 and 2,148.48 is: 3,222.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.48 : 11,430.72 = 2,148.48 : x
  2. Step 2: Convert to fraction form
    7,620.48/11,430.72 = 2,148.48/x
  3. Step 3: Cross multiply
    7,620.48x = 11,430.72 × 2,148.48
  4. Step 4: Simplify right side
    7,620.48x = 24,558,673.31
  5. Step 5: Solve for x
    x = 24,558,673.31/7,620.48
  6. Step 6: Final answer
    x = 3,222.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.