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Finding the Fourth Proportional to 18,697.25, 28,051.95 and 13,080.71

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Solution

The fourth proportional to 18,697.25, 28,051.95 and 13,080.71 is: 19,625.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.25 : 28,051.95 = 13,080.71 : x
  2. Step 2: Convert to fraction form
    18,697.25/28,051.95 = 13,080.71/x
  3. Step 3: Cross multiply
    18,697.25x = 28,051.95 × 13,080.71
  4. Step 4: Simplify right side
    18,697.25x = 366,939,422.88
  5. Step 5: Solve for x
    x = 366,939,422.88/18,697.25
  6. Step 6: Final answer
    x = 19,625.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.