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Finding the Fourth Proportional to 18,703.67, 25,804.44 and 12,342.20

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Solution

The fourth proportional to 18,703.67, 25,804.44 and 12,342.20 is: 17,027.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.67 : 25,804.44 = 12,342.20 : x
  2. Step 2: Convert to fraction form
    18,703.67/25,804.44 = 12,342.20/x
  3. Step 3: Cross multiply
    18,703.67x = 25,804.44 × 12,342.20
  4. Step 4: Simplify right side
    18,703.67x = 318,483,430.35
  5. Step 5: Solve for x
    x = 318,483,430.35/18,703.67
  6. Step 6: Final answer
    x = 17,027.86

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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.