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Finding the Third Proportional to 5,590.69 and 7,980.19

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Solution

The third proportional to 5,590.69 and 7,980.19 is: 11,390.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,590.69 : 7,980.19 = 7,980.19 : x
  2. Step 2: Convert to fraction form
    5,590.69/7,980.19 = 7,980.19/x
  3. Step 3: Cross multiply
    5,590.69x = 7,980.19 × 7,980.19
  4. Step 4: Simplify right side
    5,590.69x = 63,683,392.54
  5. Step 5: Solve for x
    x = 63,683,392.54/5,590.69
  6. Step 6: Final answer
    x = 11,390.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.