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Finding the Fourth Proportional to 21,999.30, 32,960.55 and 18,927.30

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Solution

The fourth proportional to 21,999.30, 32,960.55 and 18,927.30 is: 28,357.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.30 : 32,960.55 = 18,927.30 : x
  2. Step 2: Convert to fraction form
    21,999.30/32,960.55 = 18,927.30/x
  3. Step 3: Cross multiply
    21,999.30x = 32,960.55 × 18,927.30
  4. Step 4: Simplify right side
    21,999.30x = 623,854,218.02
  5. Step 5: Solve for x
    x = 623,854,218.02/21,999.30
  6. Step 6: Final answer
    x = 28,357.91

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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.