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Finding the Fourth Proportional to 7,879.48, 11,783.88 and 7,007.51

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Solution

The fourth proportional to 7,879.48, 11,783.88 and 7,007.51 is: 10,479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.48 : 11,783.88 = 7,007.51 : x
  2. Step 2: Convert to fraction form
    7,879.48/11,783.88 = 7,007.51/x
  3. Step 3: Cross multiply
    7,879.48x = 11,783.88 × 7,007.51
  4. Step 4: Simplify right side
    7,879.48x = 82,575,686.40
  5. Step 5: Solve for x
    x = 82,575,686.40/7,879.48
  6. Step 6: Final answer
    x = 10,479.84

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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.