Home / 19,720.47-27,220.28-12,169.11

Finding the Fourth Proportional to 19,720.47, 27,220.28 and 12,169.11

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Solution

The fourth proportional to 19,720.47, 27,220.28 and 12,169.11 is: 16,797.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.47 : 27,220.28 = 12,169.11 : x
  2. Step 2: Convert to fraction form
    19,720.47/27,220.28 = 12,169.11/x
  3. Step 3: Cross multiply
    19,720.47x = 27,220.28 × 12,169.11
  4. Step 4: Simplify right side
    19,720.47x = 331,246,520.71
  5. Step 5: Solve for x
    x = 331,246,520.71/19,720.47
  6. Step 6: Final answer
    x = 16,797.09

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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.