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Finding the Fourth Proportional to 20,463.80, 30,695.70 and 11,699.60

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Solution

The fourth proportional to 20,463.80, 30,695.70 and 11,699.60 is: 17,549.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,463.80 : 30,695.70 = 11,699.60 : x
  2. Step 2: Convert to fraction form
    20,463.80/30,695.70 = 11,699.60/x
  3. Step 3: Cross multiply
    20,463.80x = 30,695.70 × 11,699.60
  4. Step 4: Simplify right side
    20,463.80x = 359,127,411.72
  5. Step 5: Solve for x
    x = 359,127,411.72/20,463.80
  6. Step 6: Final answer
    x = 17,549.40

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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.