Home / 20,477.07-28,263.20-13,020.75

Finding the Fourth Proportional to 20,477.07, 28,263.20 and 13,020.75

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Solution

The fourth proportional to 20,477.07, 28,263.20 and 13,020.75 is: 17,971.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.07 : 28,263.20 = 13,020.75 : x
  2. Step 2: Convert to fraction form
    20,477.07/28,263.20 = 13,020.75/x
  3. Step 3: Cross multiply
    20,477.07x = 28,263.20 × 13,020.75
  4. Step 4: Simplify right side
    20,477.07x = 368,007,996.30
  5. Step 5: Solve for x
    x = 368,007,996.30/20,477.07
  6. Step 6: Final answer
    x = 17,971.71

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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.