Home / 19,108.68-26,390-13,155.72

Finding the Fourth Proportional to 19,108.68, 26,390 and 13,155.72

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Solution

The fourth proportional to 19,108.68, 26,390 and 13,155.72 is: 18,168.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,108.68 : 26,390 = 13,155.72 : x
  2. Step 2: Convert to fraction form
    19,108.68/26,390 = 13,155.72/x
  3. Step 3: Cross multiply
    19,108.68x = 26,390 × 13,155.72
  4. Step 4: Simplify right side
    19,108.68x = 347,179,450.80
  5. Step 5: Solve for x
    x = 347,179,450.80/19,108.68
  6. Step 6: Final answer
    x = 18,168.68

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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.