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Finding the Fourth Proportional to 18,281.75, 27,422.63 and 4,430.75

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Solution

The fourth proportional to 18,281.75, 27,422.63 and 4,430.75 is: 6,646.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,281.75 : 27,422.63 = 4,430.75 : x
  2. Step 2: Convert to fraction form
    18,281.75/27,422.63 = 4,430.75/x
  3. Step 3: Cross multiply
    18,281.75x = 27,422.63 × 4,430.75
  4. Step 4: Simplify right side
    18,281.75x = 121,502,817.87
  5. Step 5: Solve for x
    x = 121,502,817.87/18,281.75
  6. Step 6: Final answer
    x = 6,646.13

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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.