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Finding the Fourth Proportional to 7,620.40, 11,437.80 and 4,704.40

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Solution

The fourth proportional to 7,620.40, 11,437.80 and 4,704.40 is: 7,061.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.40 : 11,437.80 = 4,704.40 : x
  2. Step 2: Convert to fraction form
    7,620.40/11,437.80 = 4,704.40/x
  3. Step 3: Cross multiply
    7,620.40x = 11,437.80 × 4,704.40
  4. Step 4: Simplify right side
    7,620.40x = 53,807,986.32
  5. Step 5: Solve for x
    x = 53,807,986.32/7,620.40
  6. Step 6: Final answer
    x = 7,061.04

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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.