Home / 21,690.40-32,535.60-18,760

Finding the Fourth Proportional to 21,690.40, 32,535.60 and 18,760

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Solution

The fourth proportional to 21,690.40, 32,535.60 and 18,760 is: 28,140.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.40 : 32,535.60 = 18,760 : x
  2. Step 2: Convert to fraction form
    21,690.40/32,535.60 = 18,760/x
  3. Step 3: Cross multiply
    21,690.40x = 32,535.60 × 18,760
  4. Step 4: Simplify right side
    21,690.40x = 610,367,856
  5. Step 5: Solve for x
    x = 610,367,856/21,690.40
  6. Step 6: Final answer
    x = 28,140.00

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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.