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Finding the Fourth Proportional to 47,018.88, 64,879.20 and 28,152

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Solution

The fourth proportional to 47,018.88, 64,879.20 and 28,152 is: 38,845.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,018.88 : 64,879.20 = 28,152 : x
  2. Step 2: Convert to fraction form
    47,018.88/64,879.20 = 28,152/x
  3. Step 3: Cross multiply
    47,018.88x = 64,879.20 × 28,152
  4. Step 4: Simplify right side
    47,018.88x = 1,826,479,238.40
  5. Step 5: Solve for x
    x = 1,826,479,238.40/47,018.88
  6. Step 6: Final answer
    x = 38,845.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.