Home / 20,890.50-28,825.35-13,813.14

Finding the Fourth Proportional to 20,890.50, 28,825.35 and 13,813.14

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Solution

The fourth proportional to 20,890.50, 28,825.35 and 13,813.14 is: 19,059.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.50 : 28,825.35 = 13,813.14 : x
  2. Step 2: Convert to fraction form
    20,890.50/28,825.35 = 13,813.14/x
  3. Step 3: Cross multiply
    20,890.50x = 28,825.35 × 13,813.14
  4. Step 4: Simplify right side
    20,890.50x = 398,168,595.10
  5. Step 5: Solve for x
    x = 398,168,595.10/20,890.50
  6. Step 6: Final answer
    x = 19,059.79

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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.