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Finding the Fourth Proportional to 18,657.93, 25,720.74 and 14,173.89

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Solution

The fourth proportional to 18,657.93, 25,720.74 and 14,173.89 is: 19,539.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.93 : 25,720.74 = 14,173.89 : x
  2. Step 2: Convert to fraction form
    18,657.93/25,720.74 = 14,173.89/x
  3. Step 3: Cross multiply
    18,657.93x = 25,720.74 × 14,173.89
  4. Step 4: Simplify right side
    18,657.93x = 364,563,060.04
  5. Step 5: Solve for x
    x = 364,563,060.04/18,657.93
  6. Step 6: Final answer
    x = 19,539.31

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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.