Home / 13,485.80-20,228.70-10,205.30

Finding the Fourth Proportional to 13,485.80, 20,228.70 and 10,205.30

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Solution

The fourth proportional to 13,485.80, 20,228.70 and 10,205.30 is: 15,307.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.80 : 20,228.70 = 10,205.30 : x
  2. Step 2: Convert to fraction form
    13,485.80/20,228.70 = 10,205.30/x
  3. Step 3: Cross multiply
    13,485.80x = 20,228.70 × 10,205.30
  4. Step 4: Simplify right side
    13,485.80x = 206,439,952.11
  5. Step 5: Solve for x
    x = 206,439,952.11/13,485.80
  6. Step 6: Final answer
    x = 15,307.95

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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.