Home / 21,813.90-32,769.45-20,928.30

Finding the Fourth Proportional to 21,813.90, 32,769.45 and 20,928.30

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Solution

The fourth proportional to 21,813.90, 32,769.45 and 20,928.30 is: 31,439.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.90 : 32,769.45 = 20,928.30 : x
  2. Step 2: Convert to fraction form
    21,813.90/32,769.45 = 20,928.30/x
  3. Step 3: Cross multiply
    21,813.90x = 32,769.45 × 20,928.30
  4. Step 4: Simplify right side
    21,813.90x = 685,808,880.44
  5. Step 5: Solve for x
    x = 685,808,880.44/21,813.90
  6. Step 6: Final answer
    x = 31,439.08

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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.