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Finding the Fourth Proportional to 18,637.85, 25,720.02 and 13,879.08

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Solution

The fourth proportional to 18,637.85, 25,720.02 and 13,879.08 is: 19,152.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637.85 : 25,720.02 = 13,879.08 : x
  2. Step 2: Convert to fraction form
    18,637.85/25,720.02 = 13,879.08/x
  3. Step 3: Cross multiply
    18,637.85x = 25,720.02 × 13,879.08
  4. Step 4: Simplify right side
    18,637.85x = 356,970,215.18
  5. Step 5: Solve for x
    x = 356,970,215.18/18,637.85
  6. Step 6: Final answer
    x = 19,152.97

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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.