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Finding the Fourth Proportional to 21,911.70, 32,867.55 and 18,266.70

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Solution

The fourth proportional to 21,911.70, 32,867.55 and 18,266.70 is: 27,400.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.70 : 32,867.55 = 18,266.70 : x
  2. Step 2: Convert to fraction form
    21,911.70/32,867.55 = 18,266.70/x
  3. Step 3: Cross multiply
    21,911.70x = 32,867.55 × 18,266.70
  4. Step 4: Simplify right side
    21,911.70x = 600,381,675.59
  5. Step 5: Solve for x
    x = 600,381,675.59/21,911.70
  6. Step 6: Final answer
    x = 27,400.05

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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.