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Finding the Fourth Proportional to 13,879.52, 20,807.76 and 9,486.08

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Solution

The fourth proportional to 13,879.52, 20,807.76 and 9,486.08 is: 14,221.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.52 : 20,807.76 = 9,486.08 : x
  2. Step 2: Convert to fraction form
    13,879.52/20,807.76 = 9,486.08/x
  3. Step 3: Cross multiply
    13,879.52x = 20,807.76 × 9,486.08
  4. Step 4: Simplify right side
    13,879.52x = 197,384,075.98
  5. Step 5: Solve for x
    x = 197,384,075.98/13,879.52
  6. Step 6: Final answer
    x = 14,221.25

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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.