Home / 19,685.28-27,157.68-12,615.84

Finding the Fourth Proportional to 19,685.28, 27,157.68 and 12,615.84

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Solution

The fourth proportional to 19,685.28, 27,157.68 and 12,615.84 is: 17,404.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,685.28 : 27,157.68 = 12,615.84 : x
  2. Step 2: Convert to fraction form
    19,685.28/27,157.68 = 12,615.84/x
  3. Step 3: Cross multiply
    19,685.28x = 27,157.68 × 12,615.84
  4. Step 4: Simplify right side
    19,685.28x = 342,616,945.65
  5. Step 5: Solve for x
    x = 342,616,945.65/19,685.28
  6. Step 6: Final answer
    x = 17,404.73

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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.