Home / 9,780.80-14,668.32-5,161.28

Finding the Fourth Proportional to 9,780.80, 14,668.32 and 5,161.28

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Solution

The fourth proportional to 9,780.80, 14,668.32 and 5,161.28 is: 7,740.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,780.80 : 14,668.32 = 5,161.28 : x
  2. Step 2: Convert to fraction form
    9,780.80/14,668.32 = 5,161.28/x
  3. Step 3: Cross multiply
    9,780.80x = 14,668.32 × 5,161.28
  4. Step 4: Simplify right side
    9,780.80x = 75,707,306.65
  5. Step 5: Solve for x
    x = 75,707,306.65/9,780.80
  6. Step 6: Final answer
    x = 7,740.40

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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.