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Finding the Fourth Proportional to 18,697.80, 25,804.78 and 13,973.88

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Solution

The fourth proportional to 18,697.80, 25,804.78 and 13,973.88 is: 19,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.80 : 25,804.78 = 13,973.88 : x
  2. Step 2: Convert to fraction form
    18,697.80/25,804.78 = 13,973.88/x
  3. Step 3: Cross multiply
    18,697.80x = 25,804.78 × 13,973.88
  4. Step 4: Simplify right side
    18,697.80x = 360,592,899.15
  5. Step 5: Solve for x
    x = 360,592,899.15/18,697.80
  6. Step 6: Final answer
    x = 19,285.31

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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.