Home / 19,721.72-27,222-12,170.36

Finding the Fourth Proportional to 19,721.72, 27,222 and 12,170.36

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Solution

The fourth proportional to 19,721.72, 27,222 and 12,170.36 is: 16,798.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.72 : 27,222 = 12,170.36 : x
  2. Step 2: Convert to fraction form
    19,721.72/27,222 = 12,170.36/x
  3. Step 3: Cross multiply
    19,721.72x = 27,222 × 12,170.36
  4. Step 4: Simplify right side
    19,721.72x = 331,301,539.92
  5. Step 5: Solve for x
    x = 331,301,539.92/19,721.72
  6. Step 6: Final answer
    x = 16,798.82

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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.