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Finding the Fourth Proportional to 14,805.18, 20,405.52 and 12,904.92

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Solution

The fourth proportional to 14,805.18, 20,405.52 and 12,904.92 is: 17,786.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,805.18 : 20,405.52 = 12,904.92 : x
  2. Step 2: Convert to fraction form
    14,805.18/20,405.52 = 12,904.92/x
  3. Step 3: Cross multiply
    14,805.18x = 20,405.52 × 12,904.92
  4. Step 4: Simplify right side
    14,805.18x = 263,331,603.16
  5. Step 5: Solve for x
    x = 263,331,603.16/14,805.18
  6. Step 6: Final answer
    x = 17,786.45

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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.