Home / 28,089.10-42,145.80-21,839.75

Finding the Fourth Proportional to 28,089.10, 42,145.80 and 21,839.75

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Solution

The fourth proportional to 28,089.10, 42,145.80 and 21,839.75 is: 32,769.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,089.10 : 42,145.80 = 21,839.75 : x
  2. Step 2: Convert to fraction form
    28,089.10/42,145.80 = 21,839.75/x
  3. Step 3: Cross multiply
    28,089.10x = 42,145.80 × 21,839.75
  4. Step 4: Simplify right side
    28,089.10x = 920,453,735.55
  5. Step 5: Solve for x
    x = 920,453,735.55/28,089.10
  6. Step 6: Final answer
    x = 32,769.07

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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.