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Finding the Fourth Proportional to 30,808.80, 46,234.80 and 13,291.20

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Solution

The fourth proportional to 30,808.80, 46,234.80 and 13,291.20 is: 19,946.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,808.80 : 46,234.80 = 13,291.20 : x
  2. Step 2: Convert to fraction form
    30,808.80/46,234.80 = 13,291.20/x
  3. Step 3: Cross multiply
    30,808.80x = 46,234.80 × 13,291.20
  4. Step 4: Simplify right side
    30,808.80x = 614,515,973.76
  5. Step 5: Solve for x
    x = 614,515,973.76/30,808.80
  6. Step 6: Final answer
    x = 19,946.12

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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.