Home / 20,678.31-28,525.91-13,504.95

Finding the Fourth Proportional to 20,678.31, 28,525.91 and 13,504.95

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Solution

The fourth proportional to 20,678.31, 28,525.91 and 13,504.95 is: 18,630.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.31 : 28,525.91 = 13,504.95 : x
  2. Step 2: Convert to fraction form
    20,678.31/28,525.91 = 13,504.95/x
  3. Step 3: Cross multiply
    20,678.31x = 28,525.91 × 13,504.95
  4. Step 4: Simplify right side
    20,678.31x = 385,240,920.73
  5. Step 5: Solve for x
    x = 385,240,920.73/20,678.31
  6. Step 6: Final answer
    x = 18,630.19

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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.