Home / 21,890.80-32,836.20-15,209.20

Finding the Fourth Proportional to 21,890.80, 32,836.20 and 15,209.20

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Solution

The fourth proportional to 21,890.80, 32,836.20 and 15,209.20 is: 22,813.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.80 : 32,836.20 = 15,209.20 : x
  2. Step 2: Convert to fraction form
    21,890.80/32,836.20 = 15,209.20/x
  3. Step 3: Cross multiply
    21,890.80x = 32,836.20 × 15,209.20
  4. Step 4: Simplify right side
    21,890.80x = 499,412,333.04
  5. Step 5: Solve for x
    x = 499,412,333.04/21,890.80
  6. Step 6: Final answer
    x = 22,813.80

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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.