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Finding the Fourth Proportional to 10,879.76, 16,319.64 and 4,723.76

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Solution

The fourth proportional to 10,879.76, 16,319.64 and 4,723.76 is: 7,085.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.76 : 16,319.64 = 4,723.76 : x
  2. Step 2: Convert to fraction form
    10,879.76/16,319.64 = 4,723.76/x
  3. Step 3: Cross multiply
    10,879.76x = 16,319.64 × 4,723.76
  4. Step 4: Simplify right side
    10,879.76x = 77,090,062.65
  5. Step 5: Solve for x
    x = 77,090,062.65/10,879.76
  6. Step 6: Final answer
    x = 7,085.64

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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.