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Finding the Fourth Proportional to 20,238.80, 27,907.80 and 14,863.52

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Solution

The fourth proportional to 20,238.80, 27,907.80 and 14,863.52 is: 20,495.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,238.80 : 27,907.80 = 14,863.52 : x
  2. Step 2: Convert to fraction form
    20,238.80/27,907.80 = 14,863.52/x
  3. Step 3: Cross multiply
    20,238.80x = 27,907.80 × 14,863.52
  4. Step 4: Simplify right side
    20,238.80x = 414,808,143.46
  5. Step 5: Solve for x
    x = 414,808,143.46/20,238.80
  6. Step 6: Final answer
    x = 20,495.69

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1.5x scale

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.