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Finding the Fourth Proportional to 9,420.48, 14,121.48 and 4,488.78

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Solution

The fourth proportional to 9,420.48, 14,121.48 and 4,488.78 is: 6,728.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.48 : 14,121.48 = 4,488.78 : x
  2. Step 2: Convert to fraction form
    9,420.48/14,121.48 = 4,488.78/x
  3. Step 3: Cross multiply
    9,420.48x = 14,121.48 × 4,488.78
  4. Step 4: Simplify right side
    9,420.48x = 63,388,216.99
  5. Step 5: Solve for x
    x = 63,388,216.99/9,420.48
  6. Step 6: Final answer
    x = 6,728.77

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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.