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Finding the Fourth Proportional to 18,984.14, 28,281.31 and 18,131.22

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Solution

The fourth proportional to 18,984.14, 28,281.31 and 18,131.22 is: 27,010.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.14 : 28,281.31 = 18,131.22 : x
  2. Step 2: Convert to fraction form
    18,984.14/28,281.31 = 18,131.22/x
  3. Step 3: Cross multiply
    18,984.14x = 28,281.31 × 18,131.22
  4. Step 4: Simplify right side
    18,984.14x = 512,774,653.50
  5. Step 5: Solve for x
    x = 512,774,653.50/18,984.14
  6. Step 6: Final answer
    x = 27,010.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.