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Finding the Fourth Proportional to 13,752.99, 20,530.01 and 12,725.81

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Solution

The fourth proportional to 13,752.99, 20,530.01 and 12,725.81 is: 18,996.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.99 : 20,530.01 = 12,725.81 : x
  2. Step 2: Convert to fraction form
    13,752.99/20,530.01 = 12,725.81/x
  3. Step 3: Cross multiply
    13,752.99x = 20,530.01 × 12,725.81
  4. Step 4: Simplify right side
    13,752.99x = 261,260,941.13
  5. Step 5: Solve for x
    x = 261,260,941.13/13,752.99
  6. Step 6: Final answer
    x = 18,996.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.