Home / 20,362.80-28,102.98-12,405.03

Finding the Fourth Proportional to 20,362.80, 28,102.98 and 12,405.03

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Solution

The fourth proportional to 20,362.80, 28,102.98 and 12,405.03 is: 17,120.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,362.80 : 28,102.98 = 12,405.03 : x
  2. Step 2: Convert to fraction form
    20,362.80/28,102.98 = 12,405.03/x
  3. Step 3: Cross multiply
    20,362.80x = 28,102.98 × 12,405.03
  4. Step 4: Simplify right side
    20,362.80x = 348,618,309.99
  5. Step 5: Solve for x
    x = 348,618,309.99/20,362.80
  6. Step 6: Final answer
    x = 17,120.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.