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Finding the Fourth Proportional to 9,420.52, 12,999.78 and 5,228.50

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Solution

The fourth proportional to 9,420.52, 12,999.78 and 5,228.50 is: 7,215.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.52 : 12,999.78 = 5,228.50 : x
  2. Step 2: Convert to fraction form
    9,420.52/12,999.78 = 5,228.50/x
  3. Step 3: Cross multiply
    9,420.52x = 12,999.78 × 5,228.50
  4. Step 4: Simplify right side
    9,420.52x = 67,969,349.73
  5. Step 5: Solve for x
    x = 67,969,349.73/9,420.52
  6. Step 6: Final answer
    x = 7,215.03

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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.