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Finding the Fourth Proportional to 12,879.52, 19,320.80 and 4,557.80

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Solution

The fourth proportional to 12,879.52, 19,320.80 and 4,557.80 is: 6,837.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.52 : 19,320.80 = 4,557.80 : x
  2. Step 2: Convert to fraction form
    12,879.52/19,320.80 = 4,557.80/x
  3. Step 3: Cross multiply
    12,879.52x = 19,320.80 × 4,557.80
  4. Step 4: Simplify right side
    12,879.52x = 88,060,342.24
  5. Step 5: Solve for x
    x = 88,060,342.24/12,879.52
  6. Step 6: Final answer
    x = 6,837.24

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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.