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Finding the Fourth Proportional to 19,697.55, 27,191.81 and 12,628.01

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Solution

The fourth proportional to 19,697.55, 27,191.81 and 12,628.01 is: 17,432.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,697.55 : 27,191.81 = 12,628.01 : x
  2. Step 2: Convert to fraction form
    19,697.55/27,191.81 = 12,628.01/x
  3. Step 3: Cross multiply
    19,697.55x = 27,191.81 × 12,628.01
  4. Step 4: Simplify right side
    19,697.55x = 343,378,344.21
  5. Step 5: Solve for x
    x = 343,378,344.21/19,697.55
  6. Step 6: Final answer
    x = 17,432.54

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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.